Overpowered items, superpowers that are just too super, or get-out-of-jail-free technology are easy to create by accident. Here's worldbuilding Do's and Don'ts,

Who do you cry out for when you’re in pain? Is it God? Your mom? Or do you try to stifle your cries?
Even our characters are a product of their environment.

Worldbuilding in your novel is the egg in your souffle. If it’s well balanced, well-mixed, it makes everything work better.