March of the Old Gods

When one or more creatures you control dies,
put an omen counter on March of the Old Gods.
This ability triggers only once each turn.
At the beginning of your upkeep, if there are 3
or more charge counters on March of the old
gods, sacrifice it and put two 9/9 green and black
god with flying, indestructible and trample.
Once they arrive, They don't leave till nothing's
left.