The Oracle of Maia is a poem and prophecy written by Tatsuya Sudou.
Contents of the Poem
The seven Pleiades set the frozen time free
Wild dance, shadowed festival, foreign song ensue
As flames of expiation light the heavens
The lion's roar echoes far and wide
Five skulls glow in the depths of the earth
The holy cross shines high up in the sky
Once the star comes to a complete halt
The Maia Maiden's heart stops with it
What then remains is paradise on earth
Marking the end and a new beginning
True Nature
Nyarlathotep dictated the poem to Sudou, who conversely passed it to Akinari Kashihara, so he could add it to the supposedly mystical tome he was writing, In Lak'ech. When the time came, he used the Joker's escapades along with those of the Masked Circle to ensure the Oracle's prophecies came to pass, ensuring reality was weakened enough in the area of Sumaru City so the release of In Lak'ech would inevitably allow the creation/return of Adolf Hitler and his Last Battalion.
This supplied Nyarlathotep with a powerful, organized military force he hoped would reach Mount Katatsumuri and reach the core of Sumaru's powers. While the bulk of the Batallion's forces was destroyed before reaching the location, Nyarlathotep himself, disguised as the Fuhrer, did manage to reach said core and force a confrontation between himself and Philemon's champions. While he lost, he had previously influenced the deranged teacher Maya Okamura to kill Maya Amano with the Spear of Longinus, fulfilling one of the last lines of the poem.
With reality itself dead, only Sumaru remained untouched, floating in an empty expanse of black nothingness.
However, Philemon appeared to the group of friends and gave them the possibility to negate the timeline by ensuring they had never met. All but Tatsuya Suou agreed, creating the Eternal Punishment timeline and killing the Innocent Sin one, fulfilling the last line of the poem. However, the dead timeline remained a threat due to Suou's refusal to surrender his memories of his friends, and became a major plot point known as the Other Side.