Also known as Jubart Igig before his death, the Spirit of Slumber originally 'helped' the citizens of Neovia cure their potion effects at a terrible price, the citizens becoming ghosts. Sophie summoned him again a decade later in Bruno's body and they lifted the curse, but not the monstrous potion effects. It took one of Sophie's potions to finally cure Neovia at last.
Let the spell be undone!
The Spirit of Slumber was summoned in his Lupe form by the Neovian townsfolk, but Sophie had to make him inhabit Bruno's body in order to summon him.