Regenerate

Regenerate allows you to touch a creature and stimulate its natural healing ability.

Effects
The target regains 4d8 + 15 hit points. For the duration of the spell, the target regains 1 hit point at the start of each of its turns (10 hit points each minute). The target's severed body parts (fingers, legs, tails, and so on), if any, are restored after 2 minutes. If you have the severed part and hold it to the stump, the spell instantaneously causes the limb to knit to the stump.

Spark Casting
At 2nd level Balance you can cast this spell without components and without expending a spell slot. However, it will cause you to take 1 point of exhaustion. You can take advantage of this feature once per long rest.