So even the Flower Knight, her Soul Artifact of choice was the "Star Ring."
The refining of a wizard tower is a long-term process. Starting from the sixth-circle, it is possible to advance to the seventh-circle during the refining process.
This lengthy time certainly requires the protection of a Soul Artifact, otherwise, in combat with others, one would definitely be at a disadvantage.
Of course, after paying a price that ordinary wizards find hard to bear, it is also possible to replace the Soul Artifact itself.
Otherwise, what would wizards do if their Soul Artifacts were damaged? Would they be without one for the rest of their lives?
The wizard tower model left by Gargamel was named "Eternal Star Abyss."
This wizard tower is fully functional, but its main focus is on sealing.
According to his design philosophy, the "Eternal Star Abyss" consists of ten layers of "Star Abyss," perfectly corresponding to the realm of wizards from the first-circle to the Legendary Wizard.