If a nontoken creature an opponent controls would die, instead exile that card and create a 2/2 black Zombie creature token.
, Sacrifice another Vampire or Zombie: Put two +1/+1 counters on Kalitas, Traitor of Ghet.
1/22/2016 Abilities that trigger whenever a creature an opponent controls dies won’t trigger unless that creature is a token (see below).
1/22/2016 If a creature token an opponent controls dies, it goes to that player’s graveyard as normal before ceasing to exist.
1/22/2016 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.
1/22/2016 You can’t sacrifice Kalitas to activate the last ability, even if it’s somehow become a Zombie.