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,

What is a fantasy race - and how is it different from a fantasy species? Janet Forbes gives us some sciency support with world building!

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.