The sponsors were usually some Legendary Wizards and Grand Wizards.
In the world of wizards, only a Ninth-Circle Wizard could be called a Grand Wizard.
Beyond that, they were Legendary Wizards.
According to Tuten, a Grand Wizard was a powerful existence comparable to some demigods of the Multidimensional Plane.
On the other hand, Legendary Wizards surpassed demigods and could be compared to gods in the Multidimensional Space.
That was why Tuten said the witch of the School of Ice, Witch Gullwig, was the closest woman to the Snow Goddess.
According to the first article of the Pan-Plane Wizard Council's Pan-Plane Wizard Constitution: No matter what sect you were from, no matter what region you were from, once you became an official wizard, you would be a member of the Pan-Plane Wizard Council. The Pan-Plane Wizard Council would protect your life rights, property rights, and intellectual property rights to original spells.