Failed Negotiations.

It is a conundrum for Legion. Chaos energy can alleviate their situation. They can use Chaos energy however they want in the Tyrant Realm, but they don't want to be bogged down with fighting there. They would rather fight here in the high heaven realm, but they can't use Chaos energy here. 

Legion-5 thought to himself in consolation, "Chaos energy won't solve all our problems anyway. It might be able to strip Origin gods of their cultivation, but it can only cause pain to Supreme Origin gods. Supreme Origin gods will just resurrect and come back to fight us."

Legion-1 agreed, "Besides, the source of our problem is not the Origin gods besieging us. It is the Supreme Alliance."