crazed fighter

this fighter never gives up is extremely fast and strong and has a dagger with magic powers! you are a 15 year old girl/boy that is not vary fast and not vary strong has a normal dagger and gives up when close to death story you were wondering around in a banded calsle looking for things you can sell to become rich but you get locked in the arena alone and a fighter called the crazed fighter walks out what do you do? do you run or do you fight?