Festering Behemoth

As an additional cost to cast Festering Behemoth,
exile any number of creature cards from
graveyards and pay {1} for each card exiled.
Festering Behemoth enters with two +1/+1
counters for each card exiled while casting this
spell.
Remove two +1/+1 counters from Festering
Behemoth, create a 2/2 zombie creature token:
Regenerate.