They timed their arrows for moments when he is about to deal a decisive blow to the demon of wrath. A demon that gets stronger over time should be put down quickly or things will become problematic. He couldn't allow that to happen, so he retaliated fiercely.
Chaotic energy burst out from his frame to form a cloud of darkness around him. Just like he expected the surrounding demons avoided it easily. The only one covered by the domain of chaos is the demon of wrath. Bolts of chaos flew out from the cloud to target the other demons. He also shot out multiple spells that he had been storing but they weren't effective. They were always alert.
He soon ran out of useful spells and he couldn't use more. For some reason, they were not attacking him with spells. They were content with their bows and arrows. The arrows were able to penetrate the cloud of darkness to disturb him no matter how much he changed his position through the cloud.