Corrupted Conscience - 22 U MBS Foil

Enchant creature
You control enchanted creature.
Enchanted creature has infect. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Karn's creation is now his master.
uncommon
Enchantment — Aura
From the Magic: The Gathering set Mirrodin Besieged.