Cheapest priced copy (Teenage Mutant Ninja Turtles): $3.49 at Card Kingdom, near mint, their price list as of .
Mutagen Man, Living Ooze 
Legendary Creature — Ooze Mutant · 2/3 · Rare · Teenage Mutant Ninja Turtles · #273
Trample
Activated abilities of artifact tokens you control cost {1} less to activate.
When Mutagen Man enters, create X Mutagen tokens. (They're artifacts 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 · $3.49 to $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Teenage Mutant Ninja Turtles | 124 | Rare | $3.49 | $3.99 |
| Teenage Mutant Ninja Turtles | 273 | Rare | $5.99 | $5.99 |
4 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 2026Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keyword abilities are activated abilities and will have colons in their reminder text.
- 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 2026Mutagen Man's second ability can cause the mana component of the cost to activate an ability of an artifact token to be {0}.