Ikoria: Lair of Behemoths

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

Zenith Flare | Instant | | Zenith Flare deals X damage to any target and you gain X life, where X is the number of cards with a cycling ability in your graveyard. | Jonas De Ro

Channeled Force | Instant | | As an additional cost to cast this spell, discard X cards. Target player draws X cards. Channeled Force deals X damage to up to one target creature or planeswalker. | Randy Vargas

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