The Magic God's Female Disciple Would Never Turn Evil

He is a god of magic who slays gods and demons. In his youth, he penned The Wave-Particle Duality of Light in a single stroke, changing the face of magic.

But why does a mighty god of magic like me have to take on disciples?! How many times have I saved the world? Is it really so unreasonable for me to coast through life now?

The girl beside him said expressionlessly, "Stop talking. Your disciples are about to find their way to this plane again. This time, they've already prepared a causality-law cage. If they catch you, you'll be their plaything forever."