Ikoria: Lair of Behemoths

Everquill Phoenix | Creature | Phoenix | Mutate {3}{R} (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.) Flying Whenever this creature mutates, create a red artifact token named Feather with "{1}, Sacrifice Feather: Return target Phoenix card from your graveyard to the battlefield tapped." | Lie Setiawan

Ferocious Tigorilla | Creature | Cat Ape | Ferocious Tigorilla enters the battlefield with your choice of a trample counter or a menace counter on it. (A creature with menace can't be blocked except by two or more creatures.) | Antonio José Manzanedo

Momentum Rumbler | Creature | Dinosaur | Whenever Momentum Rumbler attacks, if it doesn't have first strike, put a first strike counter on it. Whenever Momentum Rumbler attacks, if it has first strike, it gains double strike until end of turn. | Andrey Kuzinskiy

Porcuparrot | Creature | Bird Beast | Mutate {2}{R} (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.) {T}: This creature deals X damage to any target, where X is the number of times this creature has mutated. | Chris Seaman

Pyroceratops | Creature | Elemental Dinosaur | Trample Whenever you cast a noncreature spell, put a +1/+1 counter on Pyroceratops. | Jason A. Engle

Winota, Joiner of Forces | Legendary Creature | Human Warrior | Whenever a non-Human creature you control attacks, look at the top six cards of your library. You may put a Human creature card from among them onto the battlefield tapped and attacking. It gains indestructible until end of turn. Put the rest of the cards on the bottom of your library in a random order. | Magali Villeneuve

Proud Wildbonder | Creature | Human Warrior | Trample Creatures you control with trample have "You may have this creature assign its combat damage as though it weren't blocked." | Dmitry Burmak

Snapdax, Apex of the Hunt | Legendary Creature | Dinosaur Cat Nightmare | Mutate {2}{B/R}{W}{W} (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.) Double strike Whenever this creature mutates, it deals 4 damage to target creature or planeswalker an opponent controls and you gain 4 life. | Viktor Titov