Disclaimer. I bear no responsibility whatsoever should one very cranky, very powerful black dragon; corpse camp you for infringing upon his style (The Black Dragonflight does not strike me as the sort of organization that appreciates flattery through imitation...)
Lord Victor Nefarius
Head
Crown of Destruction, Drop: Ragnaros, Molten Core
Circle of Flame, Drop: Ambassador Flamelash: Molten Core
Shoulders
Magma Plated Pauldrons, Death Knight Tier 11
Heaving Plates of Protection, BOE: Trash Drop, Bastion of Twilight
Chest
Magma Plated Battleplate, Death Knight Tier 11
Icebone Hauberk, BOE: World Drop
Gloves (bracers do not show with this set)
Magma Plated Gauntlets, Death Knight Tier 11
Belt
Belt of the Ferocious Wolf, Reputation Reward, Guardians of Hyjal: Exalted
Legs
Magma Plated Legguards, Death Knight Tier 11
Legguards of the Unseeing, Raid Drop: Atramedes, Black Wing Descent
Feet
Treads of Savage Beatings (no blizzard armory link, wowhead link instead )
Molten Tantrum Boots Raid Drop, Magmaw, Blackwing Descent