Artificer Attack 23Armor of Acid
You cast a prepared liquid onto an ally’s armor, shrouding that comrade in a cloud of noxious fumes that harms foes.
Encounter Acid, Arcane, Implement
Standard Action Area burst 1 centered on you or one ally within 10 squares
Target: Each enemy in the burst
Attack: Intelligence vs. Reflex
Hit: 3d8 + Intelligence modifier acid damage
Effect: Until the end of your next turn, the ally in the attack’s origin square gains resist 15 acid, and any creature that makes a melee attack against that ally takes acid damage equal to 10 + your Wisdom modifier.
Published in Eberron Player's Guide, page(s) 55.