The Hand That Heal's

Using the hand, you can heal almost any injury of a companion. Depending on the injury, it can heal in a few seconds or a few hours. The catch to this spell is you have to slap the injured party as hard as you can

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, a target's hit points increase by an additional 5 for each slot level above 2nd. Level 10 or higher, injuries are healed quicker with harder slaps.