When this creature 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.")
"The Slithery! He's snatches little kids an' keeps 'em in cages! He don't got no legs and just slithers."
—Lita
![Slithering Cryptid [Teenage Mutant Ninja Turtles]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/files/c7c2525c-722c-58e7-9846-155f13d79a32.png?v=1771631116&width=1445)