jujutsu kaisen: Rebirth of a fox

Boru was just a normal child living in the Jomon period. But one day a demon attacks his village and kills his family. His anger/sadness and negativity bore so much that it actually manifested as a dark blue flame surrounding him. What happened next could only be said to be complete destruction. Not a single soul, body or house could be seen. The whole mountain had disappeared overnight. Leaving nothing but an empty crator.