Mace of Molag Bal

Whenever a player sacrifices a creature, put a
blood counter on Mace of Molag Bal.
Equipped creature gets +X/+X and trample,
where X is the number of blood counters on
Mace of Molag Bal.
Equip—Sacrifice a creature.
"The skins of those you love will fly as my banners."
~ Molag Bal