Gruthum Devastator

Trample, protection from Instant spells.
At the beginning of your upkeep, sacrifice a
creature.
Gruthum Devastator gets +1/+1 for every other Gruthum in play.
Whenever a creature dealt damage by Gruthum Devastator this turn dies, return it to
the battlefield under your control. That
creature is a black Gruthum Horror in addition
to its other colors and types.