Hoyari, Roving Burial

When Hoyari, Roving Burial enters the
battlefield exile all creature cards from graveyards
and put a devour counter on each of them.
Put a card an opponent owns in exile with a
devour counter on it into its owner's graveyard:
Create a 1/1 green Spirit creature token.
Hoyari's power is equal to the number of
creatures and/or creature cards that were put
into and/or left graveyards this turn.