From the Soul Calibur Series
Costume 1: His SC4 self.
Costume 2: His Soul Calibur 5 self.
Bio: Centuries ago, a sword was forged, it was named Soul Edge, and it was a beast. A zweihander, and, due to so much blood it drew, a demon named Inferno was born from within Soul Edge, but they need a host to become the azure clad knight known as Nightmare.
Moves
Right Slasher: Nightmare swings Soul Edge to the right
Rook Splitter: Nightmare swings Soul Edge downwards
Mail Crusher: Nightmare swings his sword, and then stabs the opponant
Shadow Slicer~Grim Stride: Nightmare swings Soul Edge in a downward position
Double Death Claw: Nightmare punches the foe twice with his claw hand
Dark Reconquista: Nightmare infuses Soul Edge with energy and does a vertical slash
X-Ray: Burn!: Nightmare stabs the opponant in the back with Soul Edge, impaling the spinal chord, then he stomps on the opponant's ribs, and he then kicks the opponant in the jaw.
Fatalities
Evil Seed: Nightmare exclaims "Watch this!" and punches the opponent with his claw, knocking his foe backwards. He uppercuts him/her into the air, then slams his sword point first into the ground and a ball of energy erupts around his opponent as they scream. Apparently, this move drains their soul into Soul Edge.Night Terror: Nightmare transforms into Night Terror, and runs the opponant through Soul Edge, flies skywards, and slices the opponant in two, before roaring
Outro: Nightmare swings Soul Edge, saying "Blood! Darkness! I shall drown the worlds in both!"
Ending: After defeating Shao Khan, Nightmare found something imbedded into Shao Khan's skull. It was the final piece of Soul Edge, with it, Nightmare was unbeatable, but he was defeated by Liu Kang, but this time, Nightmare managed to find a new host: Scorpion.