Artificer Attack 1Caustic Rampart

You spill some liquid and infuse it with energy, creating a defensive
wall of acidic fumes.

Daily        Acid, Arcane, Conjuration, Implement
Standard Action      Area wall 5 within 10 squares

Effect: You conjure a wall of acidic fumes. The wall can be up to 2 squares high and must rest on a solid surface, and it lasts until the end of your next turn. The wall is difficult terrain, and its squares are lightly obscured. Any creature that starts its turn within the wall or adjacent to it takes acid damage equal to 1d6 + your Intelligence modifier.

Sustain Minor: The wall persists.

Published in Eberron Player's Guide, page(s) 48.