Self Sacrifice

As a reaction, when you see an ally within range of your movement speed hit with an attack, you may move up to your movement speed and place yourself between the attacker and your ally taking on all the damage they would have taken instead. Damage taken in this way cannot be reduced in any way, even by resistance or immunity.

Once, if your hit points are reduced to 0 as a result of this reaction, all allies that could see it happen get Heroic Inspiration as your sacrifice inspires them to fight. This inspiring sacrifice resets on a short or long rest.

Your Dexterity or Constitution increases by 1.