Aegar, the Freezing Flame is a uncommon Legendary Creature — Giant Wizard card from Kaldheim (KHM), collector number 321. Current market price: $0.19 (foil $0.25), TCGplayer market prices via Scryfall.
Whenever a creature or planeswalker an opponent controls is dealt excess damage, if a Giant, Wizard, or spell you controlled dealt damage to it this turn, draw a card.