Wraiths are a black-centered creature type representing spectral and undead beings, with The Lord of the Rings greatly expanding the tribe through the Nazgûl and Ringwraiths.
Nazgûl allows up to nine copies in a deck and grows your Wraiths whenever the Ring tempts you, while Witch-king of Angmar punishes opponents for damaging you. Street Wraith contributes an entirely different strength by cycling for life instead of mana.