Mage Tower Referee (SOS 249)

Artifact Creature — Construct • Mana cost: {2} • Secrets of Strixhaven • Common

Whenever you cast a multicolored spell, put a +1/+1 counter on this creature.

Incapable of choosing a favorite and invulnerable to the influence of magic, it is an ideal and obnoxiously accurate referee.

Illustrated by Nino Vecia.