Pathfinder 1e Feat: Sentinel

Sentinel

 Prerequisites:
 Benefit:

• Whenever you hit a creature with an opportunity attack, its speed drops to 0 for the rest of the turn. This stops any movement they may have been taking.

• Creatures within your reach provoke opportunity attacks even if they took the Disengage action.

• When a creature within your reach makes an attack against a target other than you (and that target doesn't have this feat), you can use your reaction to make a melee weapon attack against the attacking creature.