They all prepared to attack the human army's artillery from behind. Each of them began channeling their demonic energy to create spells of black fire.
Of course, this would eventually alert the humans to their presence. But they had one major advantage: humans were accustomed to sensing mana, not demonic energy.
Demonic energy was very different, distinct. Because of that, it took them extra time to realize something was wrong—and that extra time was exactly what they needed.
William watched as his squadmates formed their own spells. Most were conjuring black fireballs, the demons' primary attack.
The captain was the only one channeling demonic energy and managing to alter its essence, creating an earth-element spell. That was extremely rare among demons.
They were impressive spells, of course, but compared to the massive black fireballs William could create? The difference was brutal.
William went up to the captain and asked him something.
