Ikoria: Lair of Behemoths

Crystalline Giant | Artifact Creature | Giant | At the beginning of combat on your turn, choose a kind of counter at random that Crystalline Giant doesn't have on it from among flying, first strike, deathtouch, hexproof, lifelink, menace, reach, trample, vigilance, and +1/+1. Put a counter of that kind on Crystalline Giant. | Jason Rainville

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

Farfinder | Creature | Fox | Vigilance When Farfinder enters the battlefield, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle. | Leesha Hannigan

Mysterious Egg | Creature | Egg | Whenever this creature mutates, put a +1/+1 counter on it. | Volkan Baǵa