Mea Culpa

Equip—{3}
Equipped creature has +2/+2, Lifelink, Vigilance and "When this creature dies or is exiled, return it on the battlefield tapped at the beginning of your next upkeep and put a grief counter on Mea Culpa"
Equipped creature has +X/+X, where X is the number of Grief counters on Mea culpa