Pact Magic

Warlocks, Hags, and Witches you control have:
Coven — If you control three or more creatures
with different powers, this creature gains
Lifelink.
Warlocks you control have:
Pay X life twice: This creature gains +X/+0
until the end of turn.
"The Lord of Bones finds your offering... sufficient."
— Ketheric Thorm