Cuboid Colony (SOS 183)

Creature — Insect • Mana cost: {G}{U} • Secrets of Strixhaven • Uncommon

Flash
Flying, trample
Increment (Whenever you cast a spell, if the amount of mana you spent is greater than this creature's power or toughness, put a +1/+1 counter on this creature.)

It's chaotic in the midst of the swarm—only when you step back does the pattern emerge.

Illustrated by Alexandre Honoré.