Burden of Kindness

You reach out and tug another's wounds into yourself, their injuries stitching closed as your body cracks and bleeds in their stead. To save them, you must bear their pain.

You may choose to expend and roll a number of Hit Dice equal to your Proficiency Bonus. You take necrotic damage equal to the number rolled. This damage can't be reduced in any way. In addition, you gain 1 level of exhaustion.

One creature of your choice within range regains a number of Hit Points equal to twice the necrotic damage you take plus your level.

If the necrotic damage would reduce you to zero hit points, instead the target regains a number of Hit Points equal to three times the necrotic damage you take plus two times your level. You then immediately fall unconscious and are dying with two failed death saving throws. Effects that would prevent you from falling to zero hit points are negated.

Using a Higher-Level Spell Slot. You may add up to two additional hit die for each spell slot level above 5.