When Hill learned about Mulan, he was diligently setting up the Magic Tower. His half-plane still needed some time to cultivate, but Hill wanted to travel the world.
He suddenly remembered that if the fall of the Goddess of Magic was destined, many landscapes might change, so he decided to see the old scenery now. Then, in a few years, he could witness the world post-upheaval.
It would undoubtedly be interesting. He even prepared many Crystal Balls for recording images.
In fact, recording images in Toril was not impossible, but it was seldom used. Using a Magic Array to record images was truly too wasteful of Energy Baryte.
However, Teraxil had Space Crystals, so there was never any trouble on this front. Moreover, William was generous in this regard, having made many methods for using Space Crystals publicly accessible. Naturally, Hill learned them all and even improved a lot.