Foggy Swamp Visions is a rare Sorcery card from Avatar: The Last Airbender Promos (PTLA), collector number 102s. Current market price: — (foil $3.65), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, waterbend {X}. (While paying a waterbend cost, you can tap your artifacts and creatures to help. Each one pays for {1}.) Exile X target creature cards from graveyards. For each creature card exiled this way, create a token that's a copy of it. At the beginning of your next end step, sacrifice those tokens.