Reaper, Harvester of Souls

Indestructible, flying, deathtouch, lifelink
Death Manipulation(If a creature you don't control
would die instead return it to the battlefield under your
control with a -1/-1 counter for each time it has been
resurrected, if it would die from Death Manipulation
instead exile it. If Reaper, Harvester of Souls would
die each creature resurrected would be put into exile.)
Blood Sacrifice 5(You may sacrifice 5 creatures, if
you do return this creature onto the battlefield)