Chitinous Crawler

Creature — Insect Horror4/4

At the beginning of combat on your turn, choose target creature card in your graveyard. Conjure a duplicate of it into your graveyard. Descend 8 — Exile a permanent card from your graveyard: You may play it. Activate only as a sorcery and only if there are eight or more permanent cards in your graveyard.

Not legal in Commander