Lord of the Nazgul is the Witch-King of Angmar leading the Ringwraiths and all manner of ghouls in the conquest of the Pelennor, which I just realized has Minas Tirith in the art
Ardbert, Warrior of Darkness* For your local legendary creature deck, Ardbert is going to become a member of the gang if they have enough white/black spells to support it, and a staple for lower-powered Ratadrabik decks that are willing to play fair
While signed cards (officially autographed by staff or artists) also exist and are extremely rare, serialized cards are generally considered the harder-to-obtain rarity because the total population is strictly capped
Check out her work at PfhorTheWin.com
Aside: Most of what we say here can be extrapolated to three-for-ones, four-for-ones, and so on
If you choose to do so, you cast it as a spell