Migratory Greathorn (Showcase) [Ikoria: Lair of Behemoths] Nixilis put an oil counter on

put an oil counter on Serum Sovereign

Whenever Trygon Predator deals combat damage to a player

Choose a creature card and/or a land card from among them

Spend this mana only to cast noncreature spells

−6: Return all nonland permanent cards with mana value 3 or less from your graveyard to the battlefield

Migratory Greathorn (Showcase) [Ikoria: Lair of Behemoths] Nixilis put an oil counter onSet: Ikoria: Lair of Behemoths Type: Creature Beast Rarity: Common Cost: {3}{G} Mutate {2}{G} (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.) Whenever this creature mutates, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.