devils deals

you can make a deal with people for there souls (via ritual, handshake or other means) the more souls you can accumulate the souls the more souls that you have the more powerful you get when  you active this ability you tempory health and a buff to your attack for 1d12 the both increase proportionally with your souls.

you grant their wish (to a limited degree) when they give their souls to you.

temp health is equivalent to the amount of souls you have 1 soul = to 1 temp health

attack buff: each soul is a round of the buff

this can be activated once per short rest