April O'Neil, Human Element
Legendary Creature — Human Detective
Whenever a player casts an artifact, instant, or sorcery spell, you create a Mutagen token. (It's an artifact with ", , Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")
"If you steal mutagen that doesn't exist from aliens that also don't exist, it's not really theft. More like creative writing!"
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