Ezili, Vodoo Monkey

Enemy creatures cannot regenerate while Ezili is
on the battlefield
Sacrifice 2 life: Summon a 0/1 sacrificial
totem token creature with 'Other creatures you control have +1/+0 and haste.' Totem buffs do
not stack.
When Ezili comes into play, curse target creature.
At the beginning of your end step, that creature
gains a -1/-1 counter.
"Hahaha! What is your will?"