Shadow Duel

Shadow Dueling is a violent way of playing Duel Monsters in Yu-Gi-Oh! 5D's. It causes the players to suffer real damage when attacked by monsters.

The Dark Signers are capable of turning Duels into Shadow Duels. When a Dark Signer engages in a Duel, the arena is surrounded by a forcefield of light, taking the shape of the Dark Signers Nazca Lines and becomes a Shadow Due. When a brainwashed Dark Signer servant engages in a Duel, the arena is instead surrounded by a purple glow.

Many concepts similiar to Shadow Dueling have existed throught Yu-Gi-Oh! series, including Shadow Games of Duel Monsters, dueling with "The Seal of Orichalcos" and Psychic Dueling.