Cheapest priced copy (Teenage Mutant Ninja Turtles): $0.35 at Card Kingdom, near mint, their price list as of .
Michelangelo, Mutant BFF 
Legendary Creature — Mutant Ninja Turtle · 4/4 · Uncommon · Teenage Mutant Ninja Turtles · #198
Each creature you control with a counter on it can't be blocked by more than one creature.
Whenever Michelangelo enters or attacks, create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Teenage Mutant Ninja Turtles | 120 | Uncommon | $0.35 | $0.49 |
| Teenage Mutant Ninja Turtles | 198 | Uncommon | $0.35 | $0.99 |
3 rulings from Wizards of the Coast
- 27 January 2026Some spells and abilities that create Mutagen tokens require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve. The Mutagen token won't be created.
- 27 January 2026Once a creature you control has been blocked, putting a counter on that creature won't cause it to stop being blocked.
- 27 January 2026Mutagen tokens are a kind of predefined token. Each one is a colorless artifact with the artifact subtype Mutagen and the ability "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery."