Spirit of the Aldergard is a uncommon Snow Creature — Bear Spirit card from Kaldheim (KHM), collector number 195. Current market price: $0.34 (foil $0.36), TCGplayer market prices via Scryfall.
When this creature enters, search your library for a snow land card, reveal it, put it into your hand, then shuffle. This creature gets +1/+0 for each other snow permanent you control.