C15 Dawnbreak Reclaimer

Flying When this creature enters, exchange control of this creature and up to one target creature an opponent controls. If you don't or can't make an exchange, sacrifice this creature. This ability still resolves if its target becomes illegal.

, Sacrifice a creature: This artifact deals 1 damage to any target. Whenever a creature enters, you may untap this artifact.

: Add . : Each player gains control of all creatures they own.