Giant of Light: I am the Great Old One

The so-called "return to the right path" refers to an era of complete scientific rationality.
In the somewhat bizarre social development of the 19th century:
In the remote countryside, a dark faith prevails. Former relatives on the verge of conversion lurk among humanity. Refugees from other universes have fled here, and ancient, bloody rituals have never ceased.
Civilization awaits its final judgment before its redemption, the awakening of Gatanozoo, and the arrival of its eternally silent demise.
Souls from afar descend upon the bloodline of R'lyeh, merging with the Outer God Omega to defeat familiar alien enemies and monsters, or perhaps thwart the plans of the evil god's cult.
He used his own light to transform into Ultraman, the one who protects all living beings in his memory, and stood tall on this land as a giant of light.

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