Feat: Knockback Spell

You imbue your spells with magical force to knock creatures back. If the next action you use is to Cast a Spell that has an area of a burst, cone, emanation, or line; has no duration; and requires creatures to attempt a Reflex or Fortitude save, the spell unleashes a forceful blast that pushes creatures away, in addition to its other effects. Each creature that failed its save against the spell is pushed 5 feet, and those who critically failed are pushed 10 feet. If the spell is a cone, emanation, or a line, you push the creature away from yourself. If the spell is a burst, you push the creature away from the center of the burst.