Harbinger of Decay

As an additional cost to cast this spell, sacrifice one
or more permanents and note their card types.

Ward—Sacrifice a permanent of each type noted
for Harbinger of Decay.

Delirium — Whenever Harbinger of Decay deals combat damage to a player, if there are four or more card types among cards in your graveyard, destroy target permanent of a type noted for Harbinger of Decay that player controls.