In his current state, Legion couldn't disable his Aegis Shield easily because it was being protected by the phantoms. But this still wasn't a problem that couldn't be solved.
Legion used the Imprison divine ability on him. This caused black spiked chains to begin restricting his movements and siphoning his energy.
Even though Legion was pouring all of their spiritual energy into the Imprison divine ability, it would still take some time to take effect. This brief time gave them the opportunity to chat.
It was the demigod that was doing most of the talking, though. And what he was doing was begging Legion.
He said, "Please stop. I will give you whatever you want."
Legion smiled at him and said, "Don't worry. We will get everything you have after we are done with you."
If it were anyone else that made the claim, he would have scoffed. But Legion is far from ordinary. He has seen that firsthand.