Cheapest priced copy (Secrets of Strixhaven): $0.35 at Card Kingdom, near mint, their price list as of .
Mage Tower Referee 
Artifact Creature — Construct · 2/1 · Common · Secrets of Strixhaven · #249
Whenever you cast a multicolored spell, put a +1/+1 counter on this creature.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Secrets of Strixhaven | 249 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 20 March 2026Mage Tower Referee's ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered or otherwise leaves the stack.