Level Up is a rare Enchantment — Aura card from Teenage Mutant Ninja Turtles Eternal (TMC), collector number 31. Current market price: $1.70 (foil $15.30), TCGplayer market prices via Scryfall.
Enchant creature When this Aura enters, put a +1/+1 counter on enchanted creature. Enchanted creature has "Whenever this creature attacks, double the number of +1/+1 counters on it. Then if it has power 10 or greater, draw a card."