Genghis Frog{G}{U}
Legendary Creature — Frog Mutant Rogue
Trample
Whenever Genghis Frog or another Mutant you control enters, 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.")
"Free our brothers! The human reign of terror around here ends tonight!"
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Illustrated By Zoltan Boros