Ambitious Augmenter is a rare Creature — Turtle Wizard card from Secrets of Strixhaven (SOS), collector number 140. Current market price: $0.26 (foil $0.39), TCGplayer market prices via Scryfall.
Increment (Whenever you cast a spell, if the amount of mana you spent is greater than this creature's power or toughness, put a +1/+1 counter on this creature.) When this creature dies, if it had one or more counters on it, create a 0/0 green and blue Fractal creature token, then put this creature's counters on that token.