From Pathfinder Impossible Magic, which isn't enabled.

Booming Blast

FOCUS 1

UNCOMMON CONCENTRATE EMOTION FOCUS MAGUS MENTAL

Cast

Requirements You're wielding a loaded firearm

Area 20-foot emanation

Requirements You're wielding a loaded firearm.

You amplify the already intense cracking noise of your gunshot to spread terror through the ranks of your foes. Make a ranged firearm Strike. Regardless of the result, each enemy in a 20-foot emanation around you must succeed at a Will save against your spell DC or be Frightened 1 (or Frightened 2 on a critical failure).

Pathfinder Impossible MagicORC