Shard of Madness

Each creature has "When this creature is put into a graveyard from play, choose target opponent. That player puts this creature card from that graveyard into play under his or her control at end of turn."

The god-warriors of Shurima were thought peerless. Perfect. But years of war against an unstoppable foe eventually bowed their spirits, then broke them entirely. Xolaani and Aatrox turned on each other in a dispute that soon threatened Runeterra's very existence.