Of Demons And Ghosts (Demon Slayer and Ghost Of Tsushima)

Iyo, the most powerful onibaba of this land, was close to being killed. The Ghosts had been chasing her for quite some time, and now they were catching up. Normally, she could kill them with ease, but she was weakened from a force she couldn't combat.

Jin Sakai: The Ghost Of Tsushima. His decimation of the Mongols had given the people hope, and the power she had cultivated from the negativity wrought by their invasion had begun to dwindle. So in a final attempt to save herself from annihilation, she used a great deal of her power to seal him away, locking him and his horse in a prison of time.

While Jin and been sealed, her efforts were for naught, and the Ghosts ended her. But before she died, she offered the final fleeting spark of her power to someone in the living world.

When Jin is freed centuries later, he is faced with an entirely new threat. Man-eating demons feeding on innocent people. This may not be the home he knew, but even still, he would always defend those who couldn't defend themselves.

This is how demons learned to fear The Ghost.

(I made this cover in photoshop, but I didn't draw any pieces used. Credits to the artists. And sorry for the incredibly long description)