# Sentinel *Source: Player's Handbook (2024) p. 207* **Prerequisite**: 4th; Strength 13 or higher or 4th; Dexterity 13 or higher You gain the following benefits. **Ability Score Increase.** Increase your Strength or Dexterity by 1, to a maximum of 20. **Guardian.** Immediately after a creature within 5 feet of you takes the [Disengage](Mechanics/CLI/rules/actions.md#Disengage) action or hits a target other than you with an attack, you can make an [Opportunity Attack](Mechanics/CLI/rules/actions.md#Opportunity%20Attack) against that creature. **Halt.** When you hit a creature with an [Opportunity Attack](Mechanics/CLI/rules/actions.md#Opportunity%20Attack), the creature's Speed becomes 0 for the rest of the current turn.