When this enchantment enters, destroy up to one target creature. At the beginning of your end step, if a creature died under an opponent's control this turn, create a Treasure token (A Treasure is an artifact with ", Sacrifice this artifact: Add one mana of any color."). Then if you control three or more Treasures, transform this enchantment.

, Sacrifice another creature or artifact: Yiazmat gains indestructible (Effects that say "destroy" don't destroy that permanent. An indestructible creature can't be destroyed by damage.) until end of turn. Tap it.