Superpower?

Gabi let out a sharp sigh as she thought of the rules again. She had realized why this place feels like hell. It was indeed called Tartarus for a reason.

According to the myths, Tartarus is a place where the titans were locked. It's dark and very dangerous too.

Endless fighting and survival are indeed very hard to do. They cannot assassinate their opponents, but they could challenge someone every twelve hours and as long as you are still conscious, you cannot refuse the challenge! And the only way for you to leave this camp is to actually become crippled or someone who is unable to fight anymore.

What kind of camp is this?