Tunnel Fighter

General Feat (Prerequisite: Level 4+, Strength or Dexterity 13+)

You gain the following benefits.

Ability Score Increase. Increase your Dexterity or Strength score by 1, to a maximum of 20.

Tunnel Fighting. As an Bonus Action, you can enter a defensive stance that lasts until the start of your next turn. While in your defensive stance, you can make opportunity attacks without using your reaction a number of times equal to your proficiency bonus.

Reactive Strike. You can use your reaction to make melee attack against a creature that moves more than 5 feet while within your reach.