Gran-Gran is a rare Legendary Creature — Human Peasant Ally card from Wizards Play Network 2025 (PW25), collector number 14. Current market price: $0.39 (foil $3.13), TCGplayer market prices via Scryfall.
Whenever Gran-Gran becomes tapped, draw a card, then discard a card. Noncreature spells you cast cost {1} less to cast as long as there are three or more Lesson cards in your graveyard.