Prehistoric Turtlesaurus is a common Creature — Mutant Ninja Turtle Dinosaur card from Teenage Mutant Ninja Turtles Eternal (TMC), collector number 127. Current market price: $0.27, TCGplayer market prices via Scryfall.
This spell costs {1} less to cast if you control a creature with a +1/+1 counter on it. Vigilance (Attacking doesn't cause this creature to tap.)