Anesthesia

When you cast this spell at a creature, they fall under the effect of an extremely powerful anesthetic, completely blocking their sense of pain.

If a creature affected by this spell falls below 0 hit points, they don't fall unconscious. They can keep going as normal, with a special pool of temporary hit points equal to your spellcasting modifier multiplied by 5.

While the target has temporary hitpoints left, all melee attacks it makes are with advantage.

After these hit points end, or the concentration ends, the spell ends and the creature falls unconscious. If the target is stabilized after falling they gain 3 levels of exhaustion.

At Higher Levels. When you cast this spell using a spell slot of 5th or higher the hit point pool the target gains increases by 10 for each spell level.