Thinuan metal is a type of metal made from [[Stygia]]. [[The First Blade]] is made from a mixture of both Thinuan and [[Arandor metal]]. Thinuan metal absorbs any free soul around it as its natural property, and that property makes it highly sought-after by higher-ranking [[Devils]]. It's a _magic jar_ type of spell where you can control another body and put the soul somewhere else.