Sacrifice

You have mastered techniques to protect your allies at any cost.

When an ally is attacked within 10ft of you and is dropped to 0 hit points, you can use a reaction to sacrifice yourself, and take that hit for them instead. The damage to your ally is nullified on the hit you choose to take for them. It does not protect them from a potential second strike or multi-attack even if it's part of the enemy's same attack action. 

• Regardless of the attack roll made against your ally, the hit on you is an automatic-critical.
• You can use feat as many times as your proficiency modifier. This resets after a long rest.