From Pathfinder Lost Omens Cheliax, Infernal Inheritance, which isn't enabled.

Abrasive Drag

FEAT 12

Activity 2 actions

Requirements You are mounted and have a creature Grabbed or Restrained.

Your mount attempts an Athletics check to Trip the creature you've grabbed or restrained, then Strides. The grabbed or restrained creature keeps that condition and is pulled to a space within your reach. This is forced movement. If the grabbed or restrained creature is Prone, it takes 2 slashing damage for every 5 feet it moved.

Pathfinder Lost Omens Cheliax, Infernal InheritanceORC