Here is how I’m handling Force healing the snake:
Rey narrowed her eyes as she approached the serpent’s body, and Poe aimed his flashlight, illuminating the creature. Yes, the snake was definitely wounded. A giant gash ran across several segments. She just had to reach it for her plan to work.
In the Jedi texts, there had been an ability called Force healing described in a section exclusively for Jedi Masters. The texts made it very clear that its usage was strictly for healing broken kyber crystals, which were alive. Using it on a conscious being was considered a violation of the will of the Force. Rey didn’t understand why.
Obviously she had failed to use the ability properly on the kyber crystal in Luke’s lightsaber. But this was a perfect scenario for her to get better at it. If she could just improve her abilities, perhaps the crystal would accept the healing. She had to attempt healing this serpent. To prove herself worthy.
Carefully, slowly, she stepped over the serpent’s curved body until she stood within its coils. If it decided to kill her, all it had to do was squeeze…
Rey thought about the farm equipment she’d flown the skimmer over. A grain farmer had probably rolled a tilling blade right across this creature’s lair, flaying it open. Rey reached for the wound. The serpent hissed, and she hesitated. But it didn’t attack. Heart in her throat, she stretched her hand forward, touching the serpent’s cool segments.
Rey closed her eyes. Reached for the Force. Whenever she fought, or leapt through the jungles of Ajan Kloss, or even mind-tricked a stormtrooper into releasing her shackles, she channeled the Force. But this would call for a different technique. This time she would give.
What I like about this is that it makes it clear that only Jedi Masters could be taught this ability (all the more reason for why Anakin wanted to become a Master), and that it was only allowed for healing kyber crystals. The method he wanted to use it would be against the Jedi teachings at that time. But Rey and Ben are going to create a new generation of Jedi that won’t follow strict guidelines like this.