Hoard of Anguish

Whenever a creature an opponent controls dies,
create a colorless Treasure artifact token with
"{t}, sacrifice this artifact: Add one mana of any
color to your mana pool."
Whenever a creature deals combat damage to you,
it's controller gains control of target Treasure you control.
Sacrifice a Treasure: Hoard of Anguish deals one
damage to target attacking creature. Activate this ability only during the declare attackers step.
"If I can't have it, no one will!"