Shaeheli, Shepherd of Souls

Shaeheli, Shepherd of Souls gets +1/+1 for each creature card you own in exile.
Whenever another creature you control dies, you
may pay X life, where X is its mana value. If you
do, exile it from your graveyard, then create a
copy of it except its a 2/2 colorless dog spirit.
He wanders the wilderness in search of fresh souls,
extending a merciful hand to those who would
join his pack.