Ureni, the Song Unending is a mythic Legendary Creature — Spirit Dragon card from Tarkir: Dragonstorm (TDM), collector number 374. Current market price: $8.19 (foil $12.50), TCGplayer market prices via Scryfall.
Flying, protection from white and from black When Ureni enters, it deals X damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control, where X is the number of lands you control.