Ikoria: Lair of Behemoths

Auspicious Starrix | Creature | Elk Beast | Mutate {5}{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, exile cards from the top of your library until you exile X permanent cards, where X is the number of times this creature has mutated. Put those permanent cards onto the battlefield. | Lucas Graciano

Exuberant Wolfbear | Creature | Wolf Bear | Whenever Exuberant Wolfbear attacks, you may change the base power and toughness of target Human you control to Exuberant Wolfbear's power and toughness until end of turn. | Jesper Ejsing

Glowstone Recluse | Creature | Spider | Mutate {3}{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.) Reach Whenever this creature mutates, put two +1/+1 counters on it. | Yeong-Hao Han

Hornbash Mentor | Creature | Human Warrior | When Hornbash Mentor enters the battlefield, put a trample counter on target non-Human creature you control. {2}{G}, {T}: Put a +1/+1 counter on each creature you control with trample. | Wisnu Tan

Ivy Elemental | Creature | Elemental | Ivy Elemental enters the battlefield with X +1/+1 counters on it. | Uriah Voth

Titanoth Rex | Creature | Dinosaur Beast | Trample Cycling {1}{G} ({1}{G}, Discard this card: Draw a card.) When you cycle Titanoth Rex, put a trample counter on target creature you control. | Svetlin Velinov

Alert Heedbonder | Creature | Human Scout | Vigilance At the beginning of your end step, you gain 1 life for each creature you control with vigilance. | Randy Vargas

Parcelbeast | Creature | Elemental Beast | Mutate {G}{U} (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.) {1}, {T}: Look at the top card of your library. If it's a land card, you may put it onto the battlefield. If you don't put the card onto the battlefield, put it into your hand. | Milivoj Ćeran

Trumpeting Gnarr | Creature | Beast | Mutate {3}{G/U}{G/U} (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, create a 3/3 green Beast creature token. | Aaron Miller

Boneyard Lurker | Creature | Nightmare Beast | Mutate {2}{B/G}{B/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, return target permanent card from your graveyard to your hand. | Nils Hamm

Skull Prophet | Creature | Human Druid | {T}: Add {B} or {G}. {T}: Mill two cards. | Nils Hamm

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