Muldrotha, the Gravetide is a mythic Legendary Creature — Elemental Avatar card from Lorwyn Eclipsed Commander (ECC), collector number 128. Current market price: $0.59, TCGplayer market prices via Scryfall.
During each of your turns, you may play a land and cast a permanent spell of each permanent type from your graveyard. (If a card has multiple permanent types, choose one as you play it.)