What are Fairy pieces in Chess?

Fairy Chess Pieces? Does that mean there fairies in chess?

A fairy chess piece, variant chess piece, unorthodox chess piece, or heterodox chess piece is a piece that is not used in Standard Chess but in other Chess variants and and can vary a lot compared to the pieces used in Standard Chess. They move very differently, but they may also follow special rules for capturing, promotions, etc. There are various fairy pieces, because many different Chess Variants were developed in many different places.

I have decided to explore these fairy pieces and write a blog on each of them. They look cool. So you will some of my blogs on these fairy pieces soon!