Half-demon Shinobi

Demonic power should have a mathematical cost. For every supernatural leap they make, they lose a week of their human lifespan. For every fatal wound they regenerate, they forget a cherished memory of their human family.

What does it cost them to use their powers? Does it shorten their life, or does it slowly turn their physical body into stone? Half-Demon Shinobi

: You manage a limited card pool and use a color-matching system to trigger elemental strategies. Demonic power should have a mathematical cost

A paladin fights external evil; a Half-Demon Shinobi fights internal evil. Every use of their demonic power is a temptation. It feels good to give in to the rage, to let the demonic side take the wheel because it is efficient. It makes the job easier. But every time they do, they risk losing their humanity forever. What does it cost them to use their powers