Kalitas, Traitor of Ghet
Oath of the Gatewatch — mythic
Legendary Creature — Vampire Warrior
Kalitas, Traitor of Ghet rulings:
2016-01-22: Abilities that trigger whenever a creature an opponent controls dies won’t trigger unless that creature is a token (see below).
2016-01-22: You can’t sacrifice Kalitas to activate the last ability, even if it’s somehow become a Zombie.
2016-01-22: If a creature token an opponent controls dies, it goes to that player’s graveyard as normal before ceasing to exist.
2016-01-22: If Kalitas dies at the same time as creatures your opponents control, those creature cards will be exiled and you’ll get that many Zombies.