Remnants of Ancients

In the world of Eternals, three powerful factions coexist: Demons, Immortals, and Gods. Millions of years ago, on the planet Tianmo, these powers ruled in relative peace. However, an unexpected war broke out. The Demons, aided by their Imperial Planet, known as the "Imperial Demon Palace," escalated the conflict. At that time, the Gods and Immortals were reluctant to engage in battle as they were focused on a secretive, grand plan. After a grueling 10,000-year war, the Father God and the Immortal Emperor made the ultimate sacrifice, self-detonating along with all the powerful Gods, Immortals, and Demons. The Demons, desperate to uncover the mysterious plan of the Gods and Immortals, were left with nothing. What was the grand plan of the Gods and Immortals?