NIGHTMARE CORRIDOR

Dual-Mantle

Ran 24 Feb 2026 to 10 Aug 2026.

Skills

Polar Shift

Dual-Mantle periodically switches between two sides: red, symbolizing retribution, and blue, symbolizing forgiveness. All heroes lose 1.5% of their max health every second. While the blue side faces a hero, any damage dealt by that hero generates a Forgiving Mark, reducing their Attack Rating by up to 60% and increasing their Defense Rating by up to 40%. While the red side faces a hero, any healing that hero applies to allies or themselves generates a Punishing Mark, reducing their healing by up to 60 and increasing their Attack Rating by up to 40%.

Law of Reversal

When Dual-Mantle switches to its blue side and faces a hero, it dispels all attribute buffs from a random hero. When Dual-Mantle switches to its red side and faces a hero, it dispels most of its own debuffs and reduces all heroes' Haste for 7s. The more debuffs it dispels, the greater the Haste reduction, up to a maximum of 50.

Balance Devourer

Before Dual-Mantle switches to its red side, it selects the hero with the most Forgiving Marks and absorbs them. When the switch happens, Dual-Mantle gains a shield based on the number of marks absorbed and its Attack Rating, lasting for 6s. Before Dual-Mantle switches to its blue side, it selects the hero with the most Punishing Marks and absorbs them, increasing its damage based on the number of marks absorbed, up to a maximum of 40%.

Grace of Retribution

When Dual-Mantle switches to its blue side, it stops attacking heroes and heals itself based on its max health. When Dual-Mantle switches to its red side, it deals damage to all heroes and summons based on a percentage of their max health.

Every Nightmare Corridor boss and its dates