Resevoir of the Lost

Whenever a creature dies, put a counter on
Resevoir of the Lost for each devotion in that creatures cmc.
Remove 1 counter: Return target creature with
cmc 1 or less from a graveyard to the battlefield
under your control.
Remove 3 counters: Search your library for a
basic land, put it onto the battlefield tapped and shuffle your library.
Remove 5 counters: Put a +1/+1 counter on each creature you control.