Summons From the Beyond

At the beginning of your end step, you may
sacrifice a creature. If you do, put X Summon counters on Summons From the Beyond, where
X is the power of the sacrificed creature
When Summons From the Beyond has 30 or
more Summon counters on it, sacrifice it. If you
do, create "Grathakla" a legendary 20/20 black
God creature token with Indestructible and
Ward {7}