Topiary Lecturer is a uncommon Creature — Elf Druid card from Secrets of Strixhaven (SOS), collector number 165. Current market price: $0.23 (foil $0.36), 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.) {T}: Add an amount of {G} equal to this creature's power.