Shali's Messenger

Flying, deathtouch, lifelink
{t} Gain control of target creature in target opponents graveyard until
end of turn , it gains haste, and your choice of deathtouch or lifelink,
and becomes a zombie and a cleric in addition to its other types.
when a card would enter back into the graveyard exile
it instead,
whenever a card would enter the battlefield from the graveyard you
may pay {3}. If you do then you gain X life and each opponent loses
X life where X is the amount of creatures in your graveya