9 cards where the illustration contains “acid”

Acid-Spewer Dragon (Dragons of Tarkir #86)
Black Dragon (Adventures in the Forgotten Realms #90)
Black Dragon (Adventures in the Forgotten Realms #291)
Center Soul (Dragons of Tarkir #8)
Chain of Acid (Onslaught #252)
Necrogen Rotpriest (Phyrexia: All Will Be One #212)
Palace Siege (Fate Reforged #79)
Toxic Deluge (Commander Collection: Black #6)
Venomspout Brackus (Onslaught #295)

This search is finished. Now the real work can begin.