Soulbind Pale Haunt (3.5e Invocation)

When you use this invocation you summon a phantasmal ghostly figure which is clearly undead. It floats just behind you in your square. The creature is technically a projection, though it can be dismissed or banished as if it were a separate outsider creature. However you can just re-summon them next round. Unlike most invocations, you can only have one soulbind invocation active at one time. Using another one causes the first to vanish.

While soulbound to the pale haunt you count as an undead for the purposes of interacting with spells and effects such as a ranger's favored enemy, and effects which turn or rebuke undead end this invocation instead. While soulbound to this invocation you gain access to the following abilities.

Death Song : As a standard action you can curse all creatures in a 30 ft cone. As part of it you determine an amount of hit points to drain (up to 10 points per caster level). They are cursed, no save, and have 3 rounds to defeat you or get at least 1 mile or more away. At the end of the third round if neither of these conditions have been met then the creature takes the listed amount of damage, and the warlock takes half the damage. Effects which removes curses remove the effect of death song.

Drain Life : With a touch you can drain away life. This counts as an incorporeal touch attack which deals 1d8 damage plus your Charisma modifier in damage, and recover an equal amount of damage in hit points. Creatures which die from this rise as undead as if they were killed via negative levels. It cannot affect any creature without a Con score.

Float Step : You can a hover speed equal to your land speed, and you are immune to falling and falling damage. You can choose not to descent even if you are hovering higher than your hover speed will allow.

Puppet Corpse  You gain the effect of animate dead with no cost, but with a duration of Concentration.

Semi-Incorporeal : You have a 20% miss chance as if under the effect of blink, so it applies to all effects except force, negative energy, and positive energy, or other effects which affect ghosts.