C1210 He Closed His Eyes and Drew His Sword

The reason is very simple.

Their leader was a one-eyed dragon. The reason why he was missing an eye was because he was killed by Commander of Shadow Demon.

Both sides had a competition because of an incident. Putting aside who was in the right and who was in the wrong, Commander of Shadow Demon's attack was quite vicious.

He won that battle and took away one of the commander's eyes