Story
Many millennia ago, a meteor from space which threatened to destroy the world was stopped by Arceus who intervened to protect the world. While attempting to protect the world, Arceus was badly injured and Damos (ダモス) took care of it. As gratidude, Arceus promised to help make the desolate land of Michīna rich and prosperous so it gave Damos the Jewel of Life (命の宝玉). Arceus let Damos borrow 16 parts of its body to create the Jewel of Life which were to be returned to it on a specific date. Arceus was betrayed when it was not returned and it vowed to judge humans when it awakens.
Synopsis via AniList (English).
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