Lochmere Serpent

“Flash <br> U, Sacrifice an Island: Lochmere Serpent can’t be blocked this turn. <br> B, Sacrifice a Swamp: You gain 1 life and draw a card. <br> UB: Exile five target cards from an opponent’s graveyard. Return Lochmere Serpent from your graveyard to your hand. Activate this ability only any time you could cast a sorcery.”