April O’Neil, Human Element – 107: Commander: Teenage Mutant Ninja Turtles

• Rarity: R
• Number: 107
• SubType: Legendary Creature — Human Detective
• P: 2
• T: 5
• FlavorText: “If you steal mutagen that doesn’t exist from aliens that also don’t exist, it’s not really theft. More like creative writing!”

Whenever a player casts an artifact, instant, or sorcery spell, you 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.”)