// Whenever Phage deals combat damage to a creature, destroy that creature. It can't be regenerated.
this.addAbility(new DealsCombatDamageToACreatureTriggeredAbility(new DestroyTargetEffect(true), false, true));
// Whenever Phage deals combat damage to a player, that player loses the game.
this.addAbility(new DealsCombatDamageToAPlayerTriggeredAbility(new LoseGameTargetPlayerEffect(), false, true));
}