Instant effect
Decrease Debuff Duration
Decrease Debuff Duration is the game's own name for this effect on the battle screen. The game gives no separate description for it.
Champions with it
13 champions have a skill with a Decrease Debuff Duration effect, according to the effect lines in the game data. This lists who has it and on which skill, not how strong it is or how often it happens: values and chances are on each champion's page.
Ambassador Lethelin Field Medic (all allies)
Carlinia Always Watched (all allies)
Craklin the Blackened House Special [P]
Demytha Light of the Deep (all allies)
Lady Mikage Silkensnare (all allies)
Mad Hatter A Whiff of Madness (all allies)
Matriarch Zarguna Clanmother (all allies)
Night Queen Krixia Bladewing
Skullcrusher Unshakeable [P]
Stonebound Thisbe Heart Of Flint (all allies)
Trumborr Shrug Off [P] (this champion)
Valerie Energizing Presence (all allies)
Vizug the Noxious Despoiler of Anhelt (all allies)
Taken from the game data and not tested in battle here. See Data quality.