Accomplished Alchemist is a rare Creature — Elf Druid card from Strixhaven: School of Mages Promos (PSTX), collector number 119p. Current market price: $0.33 (foil $1.30), TCGplayer market prices via Scryfall.
{T}: Add one mana of any color. {T}: Add X mana of any one color, where X is the amount of life you gained this turn.