Scarlet Battle Mandala (3.5e Maneuver)

Every gunslinger eventually learns the anatomy of violence, the countless points on the mortal body that produce spectacular wounds when struck with a flying piece of lead, whether by studying medical texts or simply observing the results of their victories. But only once they can call up this knowledge as reflexively as they would draw their gun, aiming for vital weaknesses without thinking, can they master the scarlet battle mandala. As they enter the meditation to call it up, countless elegant red rings manifest in their vision, circling in on their foes’ weak points. Blood surges into the vessels of the gunslinger’s eyes for a split second, causing his eyes to flash a deep crimson.

As part of this maneuver, you make a single ranged attack with a firearm or ray weapon against an opponent. The attack automatically hits regardless of your foe’s AC, and ignores any miss chance due to concealment less than total concealment. The attack automatically threatens a critical hit. If you successfully confirm the critical hit, it deals +10d6 damage. In addition, because the scarlet battle mandala reveals any weaknesses a foe has, not just those of living foes, the critical hit damage and bonus damage from the maneuver still applies against foes normally immune to critical hits (such as undead).