Practiced Arsonist

You light your weapons on fire if you succeed on a DC 10 Performance check. On a success, they deal 1d4+2 fire damage in addition to the other damage they deal. On a hit, the target must succeed on a DC 15 Performance or Sleight of Hand check. On a fail, the target is lit on fire and takes 2d8+4 fire damage each turn. The target can repeat the check at the start of each turn, and automatically succeeds after 1d12+3 rounds.