Ikoria: Lair of Behemoths

Patagia Tiger | Creature | Cat | Flying When Patagia Tiger enters the battlefield, target Human you control gets +2/+2 until end of turn. | Micah Epstein

Dreamtail Heron | Creature | Elemental Bird | Mutate {3}{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.) Flying Whenever this creature mutates, draw a card. | Caio Monteiro

Cavern Whisperer | Creature | Nightmare | Mutate {3}{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.) Menace (This creature can't be blocked except by two or more creatures.) Whenever this creature mutates, each opponent discards a card. | Antonio José Manzanedo

Cloudpiercer | Creature | Dinosaur | 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.) Reach Whenever this creature mutates, you may discard a card. If you do, draw a card. | Dan Scott

Flycatcher Giraffid | Creature | Antelope Lizard | Flycatcher Giraffid enters the battlefield with your choice of a vigilance counter or a reach counter on it. | Dan Scott

Adaptive Shimmerer | Creature | Insect | Flash Adaptive Shimmerer enters the battlefield with three +1/+1 counters on it. | Jason Felix