Cleanse the Impure

Exile all creatures. For each creature exiled this
way, create a 4/4 white Angel creature tokens
with flying, vigilance, and lifelink.
This spell costs {1} less to cast for each Demon,
Devil, Imp, and Zombie on the battlefield.
Upon their golden thrones, the Gods condemned the
unclean and sent their mightiest warriors to eradicate
the filth and corrupted.