May We Fight Back Against This Awful Dullahan! (このおぞましいデュラハンに反撃を！, Kono Ozomashii Durahan ni Hangeki wo!) is the ninth chapter of the KonoSuba manga series, and covers Chapter 4 in Volume 1 of the light novels.
The Guild broadcasts for all adventurers to assemble at the town gate, where Beldia at the head of an army is fuming over why Kazuma's party didn't come to his castle after his prior invitation despite him making all sorts of preparations to greet them. Kazuma accordingly blows up at Megumin and Aqua when it is revealed that they had been continuing the daily Explosion exercises at the castle, following which Beldia expresses his rage at them letting Darkness die from his curse, only to be shocked when the very much alive Crusader comes forth.
Aqua openly laughs at Beldia's awkwardness, before casting Turn Undead which has a painful effect on the Dullahan. Surprised at someone as powerful as her present in this town, where the Demon King sent him to investigate a mysterious light, Beldia is subsequently hit with an agonising Sacred Turn Undead. Angered, the Demon King's General orders his army of Undead Knights to slaughter the town's inhabitants.
The manga omits the point of Kazuma's party being specifically named in the Guild's broadcast, as well as Beldia's monologue about him being unfairly executed in life.
