William decided to let his team study these scrolls to get to know that mysterious part of the world better. He also wrote down the way to let anyone train over Mystic Arts and also added his own perception about his experience back in that world.
"Mentioning that world… I shall go there and see what that Nightmare monster is doing," he knew he might get a backlash, but it was worth it. Feeling terrible for a few days wasn't an issue for him as long as he could gain intel about his enemy.
For a long time, he tried to look for and hunt down that monster. And yet he failed. That monster was like a sneaky rat, one that was smart enough to evade all the traps laid for it.
After finishing writing down everything, he used Mystic Arts via the organs he had, before entering into the fate and destiny world.
