Asceticism

You offer your own vitality to mend the wounds of others. When you cast this spell, you expend a number of hit points up to a maximum of half your total hit points.

Choose up to three creatures you can see within range. You distribute a pool of healing among them equal to the amount of hit points sacrificed. You can divide this healing among the chosen creatures however you see fit.

The hit point reduction to yourself cannot be reduced or mitigated by temporary hit points or damage resistance. If this healing brings a creature to its maximum hit points, any excess healing is lost.