Etsy Customs

Can we have a faq about customs ?

What kind of customs are allowed and what is “too much”…?

Maybe in this thread we can discuss possibilities …?

I was personally thinking of an all-in one brain field.

Super focus, awareness,extreme intelligence, reasoning ability, fully master conceptual thinking and telepathic communication, monk-like mental clarity, psychic skills fully upgraded and constantly upgrading, regenerate damage and heal and detox the brain.

Is this do-able and what would the price be?