Cheapest priced copy (Teenage Mutant Ninja Turtles): $0.35 at Card Kingdom, near mint, their price list as of .
Zoo Escapees 
Creature — Boar Rhino · 2/2 · Common · Teenage Mutant Ninja Turtles · #138
When this creature leaves the battlefield, 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 inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Teenage Mutant Ninja Turtles | 138 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 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."
- 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.