The flames blazed fiercely, burning every undead human near the castle walls.
The Demon Lords observed the scene with calm expressions. Then, Abizou raised his right hand high before lowering it in a commanding gesture.
From behind them, harpies flew forward toward the castle walls, each carrying a sack.
The soldiers and mages on the castle walls immediately fired arrows or launched magic attacks at the approaching harpies.
Despite their efforts, some harpies managed to get through. They dropped their sacks into the raging flames, which turned out to be filled with sand.
Several harpies targeted the same spot, and as the sand poured out, the once-roaring fire was extinguished.
Abizou then shouted in demon language, commanding the werewolves positioned below the Demon Lords to attack.
Hundreds of werewolves sprinted swiftly toward the castle walls. Some of them used the sand piles covering the burning undead as platforms, leaping up onto the castle walls.