Legion?

Excruciating wails came from Calamity Dragon once more.

As it echoed in the sky, the legion of Dragon's Spirits around its body swarmed towards Devil Kieran, as if the wail was an attack signal.

Fung!

Dragon's Spirits swarmed over Kieran like a cloud of locusts, surrounding him from every direction.

His Devil form, which stood 8 meters tall, was like a pea in front a watermelon when compared to Calamity Dragon in size; it was insignificant, likewise the Dragon's Spirits to Devil Kieran. 

Devil Kieran took a deep breath and raised his [Ruthless Beheader Flaming Sword] up high.

A horizontal sweep from left to right was then performed, the three nearest Dragon's Spirits were split in half from the waist.

The flaming sword swung back from right to left and took out three more Dragon's Spirits. This second sweep triggered the effect of Devil Overlord.

Kaboom!