Nounosua went mad, and began reverting the world to sand and stone.

Because he was the God of Creation, defeating him should have caused the world to vanish...

...but the Great Sage Sesius said, "It's okay♥," so everyone made war…

Eventually, Rudeus the knight sacrificed himself to cut down the God.

Those bathed in the spilled blood of Nounosua..

were imbued with the divine powers of creation and eternal life.

With those powers, they were left to create the world themselves.