Substantiating Bomb*

Prerequisite(s): An alchemist must be 10th level before selecting this discovery.

Benefit(s): Your bombs are infused with ectoplasm and a longing for life, lending ethereal creatures a measure of substance. You can throw a bomb that inflicts no damage but instead creates a 10-foot-radius cloud of fog that functions as fog cloud and lasts for 1 round per alchemist level. Incorporeal creatures that pass through this cloud become partially solid, taking half damage from nonmagic attacks and full damage from magic weapons, spells, and spell-like abilities. This effect lasts for the duration of the smoke cloud, even if the incorporeal creature moves outside the cloud’s area. A creature affected by the cloud can attempt a Will saving throw to negate the substantiating effects of this bomb.