One Wish

 is a weapon in SINoALICE.

Weapon Story
The magician's raison d'être was simple—love.

He would sacrifice everything for the woman he loved.

So he sacrificed all the nation's people to the corpse of his wife... Friends and siblings alike.

The man's wish would be granted...

But only when he offered his own soul to the corpse did his wife return to the land of the living.

Once revived, the woman realized there were numerous souls within her.

Not knowing who was responsible,

she immediately released the souls to their rightful owners.

In the end, all of the man's efforts

only ended with his own death.