Writhing Demon's Soul can be traded to Sage Freke for the spell Poison Cloud. Writhing Demon's Soul can be traded to Saint Urbain for the miracle Cure.

To get your hands on all the latest Demon Soul Simulator codes, you might want to join the developers’ Discord server, along with following their social media account on X and join their Roblox group.

Searing Demon's Soul can also be given to Blacksmith Ed to open up advanced weapon crafting. This allows you to use other Boss Souls as upgrade materials to craft special Boss Weapons.