Nethroi, Apex of Death - [Foil, Showcase] Ikoria: Lair of Behemoths (IKO) Box Set When Ox of Agonas enters

When Ox of Agonas enters the battlefield

you may cast target instant or sorcery card from that player's graveyard without paying its mana cost

except it's 1/1

then sacrifices all creatures they control

if you know how to read it

Nethroi, Apex of Death - [Foil, Showcase] Ikoria: Lair of Behemoths (IKO) Box Set When Ox of Agonas entersMutate {4}{G W}{B}{B} (If you cast this spell for its mutate cost, put it over or under target non Human creature you own. They mutate into the creature on top plus all abilities from under it.) Deathtouch, lifelink Whenever this creature mutates, return any number of target creature cards with total power 10 or less from your graveyard to the battlefield.