Promotion is an ability granted to those who have been reincarnated into Devils by a High-Class Devil using a Pawn Evil Piece.
The Pawn Piece grants the host the ability to promote to any of the other chess pieces and gain their special traits with the exception of the King. Promotion will only work when the Pawn is in enemy territory or at least wherever their master the King views it as one, there after the Pawn will chant "Promotion" followed by the name of the piece they choose to take the role of.
A special badge item allows the holder to grant the Pawn permission to promote when the King isn't present.
Issei is the only Devil to no longer abide by this rule as his 8 Pawn pieces have been adjusted by Ajuka after undergoing Juggernaut Drive and later unlocking Illegal Move Trident, granting him the ability to promote when and wherever without Rias' permission. This adjustment also effected his Scale Mail armor to take on new forms such as Illegal Move Trident and Cardinal Crimson Promotion.
- In the Anime, an apparition of the piece the Pawn promotes appears over them in the color of their respected clan houses.
- Light Novel Volume 9, Life.2 Arrival at Kyoto
- Light Novel Volume 9, Life.4 Showdown, Gremory Group VS Heroes Faction! In Kyoto.
- Light Novel Volume 10, Life. MAXIMUM VS Power MAXIMUM: Crimson and Red.
- Light Novel Volume 22, Life.4 The Opening Ceremony of the Rating Game World Tournament, the “Azazel Cup”!
|High School DxD|
|Devil Clan Powers||Power of Destruction • Power of Time • Worthless • Hell Fire • Immortality • Hole • Crack • King of Flies • Sea Serpent of the End|
|Custom Demonic Powers||Sacred Gear Canceller • Kankara Formula • Absolute Defense • Dragon Shot • Dress Break • Pailingual • Nyuutron Beam Cannon|
|Evil Piece Powers||Promotion • Castling|
|Demonic Powers by Clan|
|Satan Clan Powers||King of Flies • Sea Serpent of the End|
|72 Pillars Clan Powers||Power of Destruction • Power of Time • Worthless • Hell Fire • Immortality|
|Extra Demon Clan Powers||Hole • Crack|