God-Devouring Serpent

When God-Devouring Serpent enters or attacks,
exile target creature with a family counter on it.

When God-Devouring Serpent dies or is put into
exile, return God-Devouring Serpent onto the battlefield transformed.

"The great serpent of Mt. Gelmir that swallowed
Praetor Rykard. Attacks with poisonous spit, bites,
and slams."