Caustic Summons (Feat)

Your summoned allies are swamped in seething acid. Don't stand too close....

Prerequisites: Level 11

Benefit: Whenever you summon a creature or creatures with a summon spell you cast yourself (which may include the use of a magic item), the summoned creature(s) it gains the following ability:

• Acidic Aura (Ex) At the end of each of its turns, the summoned creature emits a fine mist of acid into all squares within 5 feet of its space. The summoned creature rolls a to-hit roll against all enemy creatures within the area of effect. Any enemies which are hit suffer 1d8 points of Acid (energy, common) damage per 2 CRs of the Summoned Creature (dropping fractions, to a maximum of 17d8 at CR 34 and above). The acidic aura does not harm allies of the summoned creature.