although it can be debated that a different interpretation suggests that you gain "an Attack" with a Supernatural ability.... even if that was not the case.... still it makes a Nice Attack that is Not Subject to SR and you dont provoke AoOs with it
ACIDIC SPLATTER [RESERVE]
You can channel magical energy into orbs of acid.
Prerequisite: Ability to cast 2nd-level spells.
Benefit: As long as you have an acid spell of 2nd level or
higher available to cast,
you can throw an orb of acid as a
ranged touch attack. The attack has a range of 5 feet per level
of the highest-level acid spell you have available to cast and
deals ld6 points of damage per level of that acid spell.
As a secondary benefit, you gain a +1 competence bonus
to your caster level when casting acid spells.