What would convince you that a god exists?

[Anomalocaris]

The question is, what would convince you that a god exists?

First, define for me what you would consider a god. Then, I will tell whether such a god could in principle exist, and if it could in principle exist, then what sort of evidence, if any, could convince me such a god does in fact exist.

.....even the supernatural exists?

For me "supernature" as commonly understood is a nonsensical concept. As such it in principle can't exist.