The Soul System
A system that grants power to its user under a specific condition:
The user can obtain any kind of spell, but only by killing someone and offering their soul as the key to unlocking the desired spell.
How It Works:
The user can only collect souls if they are the one who killed the person.
Exchange Method:
One soul equals one spell.
The spell can be either randomly chosen or custom-made by the user.
However, the effects of the spell depend on the soul's final emotion—whether it was positive or negative.
Negative Soul:
Spells from negative souls have limited effects.
They can only be used externally.
Their effects occur outside the user's body.
Positive Soul:
Spells from positive souls also have limited effects.
They can only be used internally.
These spells enhance the user's body, granting abilities such as superhuman strength—or potentially even immortality.