How do you disprove witchery?

Disprove means to prove wrong.

Find some fully formed elephant fossils in Cambrian rock. Find ANY modern animal before it's evolutionary ancestors in the geologic column. Evolution would be unable to explain this.   GOOD LUCK

Witchery doesn't exist and it cures nothing. It only exists in the minds of people who think that if they pray to the natural world that something will happen.

You can't disprove that!