Living Wall

General Feat (Prerequisite: Level 4+, Shield Training)

You gain the following benefits.

Ability Score Increase. Increase your Constitution score by 1, to a maximum of 20.

Shield Wall. If you are wielding a shield when an allied creature(s) is subject to a dexterity saving throw to avoid damage, you may use your reaction to move up to half your speed (only if you could end your movement inside the area). You are subject to the triggering effect and automatically fail the save against it, and creatures within 5 feet of you take reduced damage from the effect. The amount of damage reduced is equal to 5 x your proficiency bonus.

Adamant. You cannot be moved more than 5 feet against your will.