He still remembered that fateful day like it was yesterday. Even while he slumbered deep beneath the earth he revisited his last moments before it all went black. That vivid image of Colias, the King of the Solar Court and his dear brother smiling as he always did, while his glaive was impaled into his chest. Moments before Colias called for him, and Aidoneus had turned around only to receive a stab that pierced him to the core. Unlike ordinary weapons, it was a blow that was the closest thing to pain. Why? Why had his brother stabbed him? And before he could say those words, the mountain crumbled beneath their feet. That same scene repeated in his memory as his mind continued to ask the same questions. When he finally awoke from his hibernation, what devastated him the most was the realization that his brother was gone…forever. He would never be able to hear his answer.
As his wound healed, the haze began to clear and memories began to resurface of that day. It was the day when Parnassia fell, buried beneath the ground where the sun no longer shone upon it. Aidoneus began to walk through the memories flashing in his eyes. The sky was clear at midday, he was returning to his residence after performing his duties as judge over the Lunar Court. Earlier he had briefly met with his nephew Phoebis, who had told him of the birds that sang in the Solar garden. He looked so much like his father, especially his hair and eyes. Moving down the train of memories he came back at the moment he received the wound that forced him into hibernation.
There began a low rumbling, and he paid no heed at first. But then the tremors intensified, and the rumble became a roar. Colias called out to him, and he turned around. At once his brother thrust the edge of his glaive into his body. Aidoneus' eyes widened in that moment, reeling in shock. As he slumped down to the ground Colias was standing over him, hands tightly wrapped around the glaive's shaft. "I'm sorry, Aidoneus. But you must live on. Parnassia's time has come to an end. Please don't blame yourself–for my sake, and Agrias'…" He remembered looking into his eyes, and saw sadness. Following the path of his gaze, the eidolon saw golden ichor dripping down the polearm. Now he remembered… Moments before the sleep took hold, he saw Colias had impaled himself on the opposite end of the weapon. In their kingdom's final moments his brother had transferred his ichor into him.
He could feel the Void calling. Disaster shook the world as otherworldly forces attempted to tear their way into Revaliir, flooding the land with twisted abominations borne from the endless abyss. He felt he held a greater responsibility upon his shoulders because he too was Void-born, and that it was time to take up arms. Finding Antheia, he came to tell her words he wished he never had to say. "Antheia… I'll be leaving soon. I need to return to the Void. I will be of more use far beyond the reaches of the World Tree than I would here." He had told her about his people, and how they had changed upon entering this world. His power was limited within the confines of a physical form. "I can't guarantee that I will be able to return. If I were to perish, my essence will return to the Origin, the place from which all eidolons came forth. Once that happens, 'I' as an individual being will cease to exist. But if I were to return in a form different from now, please grant me the same kindness you have shown me in this incarnation."