Damon was mentally strained from the battle. His mana was low, and his shadow energy was even lower. Perhaps this could be considered part of Mist Knight Thren's strategy—to fight Damon and his party only when he was sure they were at their weakest, already exhausted from battling his enthralled mist knights.
No matter, Damon was actually stronger when his shadow energy was delepleted.
In fact one could say, that was when he was the most monstrous. In the end there was still no denying he was still exhausted.
However, Damon was the only one truly depleted. The two girls were still brimming with energy. Mana pulsed through their bodies.
There was no sign of weakness, why else would Damon cut lose. He was sure they could cover for him.
'Does he not consider them a threat…?'
That would be a grave mistake. Just like Damon, these two girls were monsters in their own right. Yet the enemy before them was no ordinary opponent. He was a rank two mist knight.