The Pale Stalker

Deathtouch, Hivemind 2

Whenever the Pale Stalker would leave the battlefield, return it to its owners hand.

When The Pale Stalker enters the battlefield, choose target creature you don't control. Until The Pale Stalker leaves the battlefield, the chosen creature is this creature's Quarry. When the Quarry leaves the battlefield, the Pale Stalker gets that creature's abilities and a number of +1/+1 counters equal to the Quarry's power plus toughness.