Bottomless abyss, underworld.
After pressing the battle lines back, Clymene returned to the arrow tower because Orion had begun communicating with her.
"Sister, that beam of red light was nothing more than a will projection," he said.
"It was most likely sent to probe our strength—to see if I would show up and confirm whether we have the support of a Legendary level will projection on our side."
Clymene gazed out over the battlefield, still uneasy about that will projection she had just encountered. Without Orion's will projection as her trump card, defending this underworld would have been impossible. Although she had already become a Shade Valkyrie, she could feel her power was no match at all against a Legendary level being's will projection.
Even Orion, back in the day, nearly suffered grievous harm when he ran into Lord Ariel's will projection—if it hadn't been for the Curse of a Hundred Blossoms that came to his aid, he would almost certainly have been in dire straits.