Anina, Natural Parallelist is a rare Legendary Creature — Human Wizard card from Alchemy: Secrets of Strixhaven (YSOS), collector number 14.
Whenever you cast a spell with {X} in its mana cost, conjure a random creature card with mana value X onto the battlefield. {T}: Add {G}{U}. Spend this mana only to cast spells with {X} in their mana costs.