Iron Constitution

Your body refuses to shut down, no matter how brutal the punishment.

• When you take damage while you are at or below half your hit point maximum, you can use your reaction to regain hit points equal to your Constitution modifier + your proficiency bonus.
• You can use this reaction after the damage is rolled, and you may use it even if the damage would reduce you to 0 hit points, potentially preventing you from falling unconscious.
• You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a short rest.