Complete Xeno (3.5e Sourcebook)/Introduction

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Outsiders are beings born from another dimension, and aberrations are species which fit not with the natural order of the world. The surface of the planet teams with life and magic, and intelligent beings walk its surface under a blanket of the sky above. But what above the sky, into the stars and heavens themselves? In some worlds, nothing... the stars are little more than pinhole lights in the cosmic cloth separating the material from the outer planes or the far realm. But in other worlds the material plain extends far beyond a single planet, into the sky, and space itself, an empty void where the stars in the skies are burning suns of their own, possibly dancing with dozens of planets, planets which can host life! In this expanded material plane, Faerun, Eberron, and other worlds are just one of many in the material, and while some may be populated with humanoid life, other beings exist, born in non-Earth worlds. They would be aberrations were they not beings originating from another material plane across the gulf of space.

Complete Xeno[edit]

While the book has the most material for Dungeon Masters seeking to add new elements such as the concept of an enemy no one yet understands, or perhaps as a First Race which has left relics across the land, there is plenty of material for players as well, allowing for the possibility of playing as alien races, campaigns spanning multiple worlds, invasion stories from either side, and abductions. It allows for games to break the mold of swords and sorcery, and possibly run modern or future campaigns with the standard D&D system. Naturally, Dungeon Masters will find dozens of monsters, feats, and lore about these alien species, allowing you to highlight just one, or all races in your game if you wish. Each chapter is devoted to a major alien species, including their home planets, ships, and technology, ready to be used in your campaign.

Origins of Aliens[edit]

While aliens share many traits with aberrations and outsiders, they are not neccessarily one of them. The key point of what makes an alien is that they are indeed material planar creatures (even the outsider ones, being native outsiders). However, their homelands are somehow alien and strange, by strange environments such as a sun too dim, or a world without a surface, or through proximity to strange effects such as brushing on the edge of the planes, existing in an alternate material world where the atmosphere is carbon dioxide, or a world where the planet is alive and erupting with magical energies powerful enough to change the surface of life upon it.

Regardless of their homeworlds, aliens can find means of traveling the great void between solar systems and still find the standard campaign settings without need of plane shifts to move into another dimension. As such, aliens by and large much either be technologically or magically advanced enough to allow for ships and other means of propulsion across the vast distances.

The major xenotheric/xenoblooded races include the following:

Appilons: The appilons are hard-shelled mollusk-like creatures from a hostile world; a land of sulfur smoke and thunder. Born in a place which would kill any lesser being they have been built to survive against all odds, split into two castes (ortshells and agiishells) which both weather out the everlasting storms of their world.

Gokiburi: The gokiburi, or Gokes are they are known in shorthand, are roach-like creatures from a semi-tropical homeworld. They are dutiful, proud, brave, and persistent, but can also be totalitarian, domineering, militant, and expansive. Born with latent psionic energy, their paragon leaders possess subtle control over their colony with mental and pheromone-based means.

Uberich: The uberich are humanoid aliens, thin and lithe, and indeed weak of frame but possessing powerful psychic minds filled with evil intent. Able to home their abilities by focusing upon a single emotion, this idea has formed the basis of even their technology, literally riding upon engines of fear.

Seppia: The seppia are kindly curious creatures from a distant gas giant. Lacking legs to walk or a body pressurized for most earth-like worlds, they walk the land in construct bodies, appearing as the local humanoids do in an effort to understand life on a world with a surface.

Noo: Noo are creatures who are all one, a single planet consumed in a sentient slime. Finding itself unable to expand any further, it reached for the stars, sending child seeds out into the depths of space in hopes of finding new planets to colonize and grow its ever-widening consciousness. All Noos are part of the Noosphere, and the Noosphere is all of Noo.

Tempus: The tempus are beings from a world long dead, long lived ancient giants who wander the land ponderously, thinking throughs slowly to conserve energy and watching the universe pass before them. They have scattered across the cosmos now, and what seems like eons to many are but the passing of another day for them.

These six races mentioned here represent the most widespread and virulent of the alien species which roam the stars, though many others exist, be they uberich slaves or natives who have no yet left their homeworlds. Some pre-existing creatures may also qualify as aliens in a setting, the most likely of all being the Neogi. which possess spider-like flying ships, visiting from a distant star, or the Tsochari which hail from a yet unknown lightless dead planet out in space. Such creatures may be given the xenoblooded subtype if desired.

Xenoblooded and Xenotheric[edit]

Being from a strange place does have its perks, manifested through the xenoblooded and xenotheric templates introduced in this book. While not all aliens have these templates, many do, a biological requirement to survive on what are otherwise alien, hostile worlds or even purposeful genetic tampering on part of the races themselves.


This subtype pertains to the Xenoblooded family of creatures very much related to the xenotheric, which hail from planes associated with aberrant lifeforms. While the xenoblooded are often just as alien as their purely xenotheric counterparts, the conditions they live in are less extreme or alien, and as such they possess very few traits of full xenotheric creatures. Unlike normal xenotherics, aberrations that gain the xenoblooded subtype through evolution do not immediately become outsiders with the augmented aberration subtype.


The traits listed here override the base traits wherever applicable.

  • The Xenoblooded subtype overrides and replaces the Extraplanar and/or Native subtypes.
  • Does not qualify for xenotheric feats or prestige classes, but does count as a xenotheric creature for the purpose of item restrictions, favored enemies, and similar.

Creatures with the Xenoblooded Subtype[edit]

The following creatures have the xenoblooded subtype:

Creature Entry CR Type Subtypes Size Description
Aberrant Troll Cavestalker 12 Aberration Augmented Giant, Psionic, Xenoblooded Large
Chiyokoid 8 Aberration Human, Psionic, Xenoblooded Medium
Ethereal Scutigera 7 Aberration Xenoblooded Large
Graha Vestige 4 Outsider Incorporeal, Psionic, Xenoblooded Tiny
Provolvic Horror 16 Outsider Extraplanar, Psionic, Xenoblooded Large
Pupathid 5 Aberration Xenoblooded Medium
Zergling 2 Aberration Xenoblooded Medium A fast, scary beast that tears people apart and runs in groups.

Races with the Xenoblooded Subtype[edit]

The following races have the xenoblooded subtype:

Creature Entry CR Type and Subtypes Size
Appilon, Agiishell Aberration [Xenoblooded] Medium
Appilon, Ortshell Aberration [Xenoblooded] Medium
Baisuzhe Aberration [Xenoblooded] Medium
Cosmin Aberration [Xenoblooded] Medium
Flumph Aberration [Xenoblooded] Small
Gokiburi Aberration [Xenoblooded] Medium
Hekatonped Magical Beast [Xenoblooded] Medium
Huldra Humanoid [Xenoblooded] Medium
Kerbal Humanoid [Xenoblooded] Small
Kremen Monstrous Humanoid [Earth, Xenoblooded] Medium
Mahaari Humanoid [Xenoblooded] Medium
Myrmidon Monstrous Humanoid [Xenoblooded] Medium
Nebular Aberration [Xenoblooded] Medium
Take Plant [Xenoblooded] Medium
Tempus Outsider [Xenoblooded] Large


This subtype pertains to the Xenotheric family of outsiders, which hail from planes associated with aberrant lifeforms. Many xenotheric species have suffered varied amounts of exposure to the transmorphic and undefined currents of the Far Realm and other such places of conception. Most xenotherics were transmogrified by their unnatural evolution, having attained a higher form of existence where thought and locution occurs solely on the cerebral state, and yet others have been horribly altered by their experiences, flensed by planar chaos until their sapience was stripped away. However, despite all of these vastly different creatures having equally varied origins, the forces they were exposed to are akin, and therefore many of their physical and mental traits overlap. Since no home or origin between them is shared, xenotherics do not belong to any single plane or realm, and simply naturally gravitate to any environments that suit their requirements.

Various superphyla of xenotheric outsiders have strong links to certain types of aberrations. Aberrations that gain the xenotheric subtype through evolution become outsiders with the Augmented Aberration subtype.


The traits listed here override the base Outsider traits wherever applicable.

  • The Xenotheric subtype overrides and replaces the Extraplanar and/or Native subtypes.
  • Xenotherics with an Intelligence score of 3 or higher have telepathy out to 100 ft.
  • May take feats with the Xenotheric tag.
  • Bio-Energy (Ex): Xenotheric metabolism is capable of producing large amounts of biological energy. This energy can then be used to power special attacks and abilities. Some of these abilities are exclusive to specific Xenotheric species, whereas others can be accessed through various Xenotheric feats. See bio-energy below.
  • Immunity to poison, polymorphing, petrification and form-altering effects. They can still be affected by polymorphing and form-altering effects created by themselves.
  • Resistance to acid 10 and electricity 10.
  • Xenotheric outsiders eat, but do not sleep. Certain xenotherics do not need to breathe; defer to the creature's statistics for information on breathing.


Certain lifeforms have the capacity to generate large amounts of metabolic energy that can be used for many different purposes. Such a creature's bio-energy pool can contain a maximum amount of charges equal to 3 plus the creature's Constitution modifier (minimum 1). These charges may be expended to facilitate certain special powers. Some of these powers are exclusive to specific species of creatures, whereas others can be accessed through various abilities gained from feats or class features.

Expended bio-energy charges regenerate at a rate of 1 charge per minute. Drained bio-energy comes back at a rate of 1 point per hour of rest.

Bio-Energy Drain: Certain more exhaustive processes cause bio-energy drain. Charges lost through bio-energy drain do not regenerate within 1 minute and are effectively lost; your bio-energy pool is treated as having 1 charge less for every charge drained. A creature with bio-energy drain equal to the size of its bio-energy pool cannot use its bio-energy for any purpose.

Bio-energy drain can be restored through one or more hours of uninterrupted rest, recovering one point of bio-energy drain per hour. Creatures that do not need sleep (like creatures with the Xenotheric subtype) still need to rest, where rest is defined as a time during which no strenuous activities are performed (actions that induce fatigue or exhaustion, or otherwise elicit Fortitude saves against these effects even if the creature is not required to attempt them).

Creatures with the Xenotheric Subtype[edit]

The following creatures have the xenotheric subtype:

Creature Entry CR Type Subtypes Size Description
Battlehead 8 Aberration Xenotheric Medium An ambush predator capable of making temporary dead-magic zones. Attacks with pincers and a sharp beak.
Battlehead, Warhead 13 Aberration Xenotheric Large An ambush predator capable of making temporary dead-magic zones. Attacks with pincers and a sharp beak.
Blattodea 3, 11 Vermin, Aberration Xenotheric, Augmented Vermin Medium, Huge
Deathclaw 5 Animal Xenotheric Medium
Elder Thing 10 Outsider Aquatic, Xenotheric Large
Fast Headcrab 2 Outsider Xenotheric Tiny
Flying Polyp 15 Outsider Air, Xenotheric Huge
Gastropotamos 4 Animal Xenotheric Large
Gokiburi 1/2, 3, 6 Aberration Xenotheric Medium
Headcrab 1/2 Outsider Xenotheric Tiny A headcrab is a predatorial Xenotheric species, whose natural hatching grounds lie within the vast plateaus of Xen.
Hedoro 3 Ooze Shapechanger, Xenotheric Medium
Kavka 1/3 Animal Xenotheric Tiny Kavkas are small avians from the planet Gokia that feed on bugs and occasionally scavenge on other meats.
Lunar Tarrasque 27 Magical Beast Xenotheric Colossal
Malcurion Dragon 8, 12, 15, 17, 21, 24, 27, 30, 33, 36, 39, 42 Dragon Xenotheric Medium, Large, Huge, Gargantuan
Mizmazer 7 Outsider Extraplanar, Psionic, Xenotheric Medium
Mkodos 4 Ooze Xenotheric Medium
Nimbus Drifter 9 Elemental Air, Xenotheric Gargantuan
Phynasm, Hungering Horror 33 Outsider Xenotheric, Eldritch Macrofine
Poison Headcrab 4 Outsider Xenotheric Tiny
Primeval Dragons 5, 8, 12, 15, 18, 22, 25, 27, 30, 33, 36, 38, 20, 23, 26, 29, 32, 35, 7, 10, 13, 16, 19, 28, 31, 34, 37, 39, 40, 9, 11, 14, 17, 21, 24, 41, 42 Dragon Earth, Fire, Air, Cold, Evil, Psionic, Good, Water, Xenotheric Large, Huge, Gargantuan, Colossal, Medium
Scoropendra 14 Outsider Augmented Aberration, Xenotheric Medium, Large
Seppia SOLO Gear 2 Construct Gear, Xenotheric Medium
Seppia, Suitless 4 Magical Beast Xenotheric Tiny
Solarian 8 Outsider Psionic, Xenotheric Medium
Thundersquid 7 Magical Beast Aquatic, Xenotheric Medium
Vortigaunt 2 Outsider Xenotheric Medium
Warp Dragon 7, 8, 10, 13, 16, 18, 21, 23, 24, 26, 27, 29 Dragon Xenotheric Medium, Large, Huge, Gargantuan, Colossal
Ya-te-veo 8 Plant Xenotheric Large

Races with the Xenotheric Subtype[edit]

Creature Entry CR Type and Subtypes Size
Brachyura Monstrous Humanoid [Aquatic, Xenotheric] Large
Noo Ooze [Shapechanger, Xenotheric] Medium
Seppia Construct [Gear, Xenotheric] Medium
Setenall Outsider [Psionic, Xenotheric] Medium
Starborn Outsider [Xenotheric, Air, Earth] Medium
Uberich Humanoid [Xenotheric] Medium
Uongo-mijusi Outsider [Xenotheric] Medium
V'Kai Aberration [Xenotheric] Medium
Vaelza Ooze [Shapechanger, Xenotheric] Medium
Zeitgeist Aberration [Xenotheric] Medium
Zherihnghil Outsider [Xenotheric] Medium

Sufficiently Advanced Science...[edit]

Several of the alien technologies introduced in this book are just that, technological, extraordinary items which often have magical or near-magical effects. Such things are inevitably useful in a magic-dominating world, able to bypass antimagic fields and giving "magic" to the otherwise mundane hands of aliens. While they have all be priced accordingly for their usefulness, you may rule that the seemingly magical weapons of the aliens are indeed magic items, build by magic-capable aliens, and thus following the normal rules for magic items. If you choose to do this, you can adjust the price lower as needed to fit similar magical items. Alien relics left on a world which does not understand them are also likely to treat them as magical items from a roleplaying perspective, even if they have no idea how they work, with all magical attempts to divine their function coming up blank. They may take on the role of lesser artifacts in this manner. Ancient alien races may be useful in explaining the origins of certain other artifacts or even the original origin of creatures such as warforged. Could the warforged been first used as a robotic exploring probe by strange beings from another time?

Introducing Aliens in your Campaign[edit]

So you have decided to use aliens in your game. You can finally play out battles in space and everything, but what if your campaign is pre-existing and you cannot start out with the knowledge of aliens in the first place? You may decide that you wish to start introducing the aliens subtly, perhaps beginning with an abduction, or strange sightings. The PCs could discover ancient ruins which ends up projecting a beam into space and weeks later, discover it has called something down from the sky. This brings of the questions of how they will interact: will they be benign or vicious? Why have they come? Do they bring their entire force of a small scout ship? More importantly consider the possibility of your PCs getting a hand on alien technology. You may wish to handwave it, saying it cannot be used because it is too advanced, and thus also provides a fine way to pose a powerful challenge against equipped opponents, yet not ruin the expected wealth by level by allowing them to loot the item-heavy bodies of their enemies. Alternatively you may want to allow them to use alien items, all the way up to starships. If such happens, your campaign setting may expand to other worlds, providing an even larger experience.

Politics, action, war, even ship-sailing themes can be explored using alien technology, as the PCs desperately attempt to figure out how to fix their ship as hostile beings chase them down, or their diplomacy attempts end up causing a much larger problem for their home planet. They may reach another land filled with alien gods, or end up hurling through time, only to arrive back home in the far future. The choice is up to you!

Alien Galaxy[edit]

Most xeno can be found within the alien galaxy below.

Galaxy Traits: The alien galaxy is a region of the material universe. Galaxy traits apply to the vacuum of space, each sphere may have slight changes.

Planar Connections: The galaxy is part of the material plane, and is connected to other planes in the normal way. Some space ships can hyper-jump, when doing so they briefly visit the plane of shadow.

Movement and Combat: In space all ship speeds are tripled (including in first sphere).

Regional Spheres[edit]

An axial map of the xeno galaxy. Systems move around this axis at a constant relative rate (see below).

The galaxy can be broken up into three regional spheres.

  1. The first sphere is a central core which is uninhabitable to even aliens. The first sphere has the following changes: heavy directional gravity, 5000 light-year diameter, highly morphic, major negative and fire dominant (to ship and occupants), and has dead magic. The inner 1000 light-years is a black hole that pulls everything within the first sphere 600’/round, an escape check does nothing against this force, ships cannot hyperjump while in the first sphere, and anything caught within the black hole is crushed into non-existence. (Thus ships with speeds under 200’ have no escape, anything over that can escape with speed.) Sector E5 is the galaxy core.
  2. The second sphere has mostly dead planets, and a few extremely hardy species. The second sphere has the following changes: 10,000 light-year radius and is alterable morphic. Second sphere is roughly a circle with outer limits being C3-G3 and C7-G7, and C3-C7 and G3-G7 (excluding E5).
  3. The third sphere is much more hospitable. The third sphere has the following changes: 10,000 light-year radius, is static, minor positive-dominant, and has enhanced magic. Third sphere is all sectors not previously mentioned.

Sectors and Planets[edit]

A sector is 5000 light-years in diameter. Every other letter and number are not included in the above map but do exist between. Each sector can be broken down into quadrant rings. Some planets move faster than others, however, relative to the galaxy, all solar systems remain in the same area. All systems rotate counter-clockwise at a constant relative rate around the black hole. The location of know planets follow:

Ship Cities and Living Planets[edit]

Some alien cultures are so advanced that they have created entire space cities or become planets. Fleet and colony ships are types of space cities, and the Noosphere is a living planet. All are mobile.

Space Travel[edit]

Some ships have a hyperdrive which allows them to rapidly travel from one sector to another. A single hyper-jump can be up to 10,000 light-years and is precise. However, no jump can go through the central core. Ships can jump to different parts of a sector, but if a planet or moon is close this is a waste of fuel.

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SummaryThis subtype pertains to the Xenoblooded family of creatures very much related to the xenotheric, which hail from planes associated with aberrant lifeforms. +, This subtype pertains to the Xenotheric family of outsiders, which hail from planes associated with aberrant lifeforms. + and Certain lifeforms have the capacity to generate large amounts of metabolic energy that can be used for many different purposes. +