Delle, Corrupted Cleric

At the beginning of each end step, add the effects
based on the total amount of life lost by players
this turn. (Damage causes loss of life.)
1-3 - Draw a card.
4-7 - Create a 2/2 black cleric creature token with Lifelink.
8-13 - Each opponent sacrifices a creature, you gain
3 life.
14 or more - Return a creature from each players graveyard to the battlefield under your control.