Hei Bai, Forest Guardian is a mythic Legendary Creature — Bear Spirit card from Avatar: The Last Airbender Eternal (TLE), collector number 205. Current market price: $11.24 (foil $11.32), TCGplayer market prices via Scryfall.
When Hei Bai enters, reveal cards from the top of your library until you reveal a Shrine card. You may put that card onto the battlefield. Then shuffle. {W}{U}{B}{R}{G}, {T}: For each legendary enchantment you control, create a 1/1 colorless Spirit creature token with "This token can't block or be blocked by non-Spirit creatures."