Whatever trouble Umbridge was stirring up now, Will had stopped paying attention. He no longer wanted to bother with any of it. Umbridge was only a minor player, almost insignificant.
He had targeted Umbridge partly because he disliked her and partly to make his position clear. After all, he was still on Dumbledore's side.
But setting aside the situation at Hogwarts for now...
In the laboratory, Will let out a long breath. He had finally made up his mind: no matter what, he would use the Hour-Reversal Charm this time. A full moon came only once a month, and he couldn't wait for each one to continue his research on werewolves.
As long as he stuck to his usual research while in the past and avoided sensitive knowledge—such as how to create artificial werewolves or completely remove Werewolf Venom—he should be fine.
First, Will needed to strengthen the Werewolf Venom Curse.
Dumbledore had been clear: a werewolf's transformation probably wasn't like a Veela's, a shift toward some strange, predetermined form.
Will believed that stopping it might not require cutting anything away after the transformation began. He could prepare in advance, and the existing Werewolf Venom Curse was well suited to that.
The curse worked by building a defense that kept the werewolf's magic from invading the brain and eroding reason. It was much like wrapping the brain in a protective film.
What Will needed to do now was turn that "protection" into "complete isolation."
This time, he would improve and strengthen the Werewolf Venom Curse. His aim wasn't to build a wall around the brain, but around the Werewolf Venom Magic.
He would confine the Werewolf Venom Magic to one region of the werewolf's body, preventing it from spreading or resonating. Then he would use a Soul Annihilation version