Lier, Disciple of the Drowned is a mythic Legendary Creature — Human Wizard card from Innistrad: Double Feature (DBL), collector number 59. Current market price: $8.28 (foil $25.44), TCGplayer market prices via Scryfall.
Spells can't be countered. Each instant and sorcery card in your graveyard has flashback. The flashback cost is equal to that card's mana cost.