Sentinel

Sentinel
Feat
Prerequisite: Level 4; Ability STR 13+ or Level 4; Ability DEX 13+

You gain the following benefits.
Guardian.
Immediately after a creature within 5 feet of you takes the Disengage action or hits a target other than you with an attack, you can make an Opportunity Attack against that creature.
Halt.
When you hit a creature with an Opportunity Attack, the creature's Speed becomes 0 for the rest of the current turn.

Source: Player's Handbook (2024) (XPHB), page 207