Let’s invent some very weird pieces!



There are lots of pieces here:
https://www.chessvariants.com/ideas/index-a-to-man-and-beast
Just keep pressing "Next page" at the bottom of the list to advance to the next letter.
Why do you need more pieces?
"Can not capture and can not be captured"
That is a Block: https://www.chessvariants.com/rules/travelers
The Canon name is already taken: https://www.chessvariants.com/piececlopedia.dir/pao.html

Well, I would say King-Queen. It moves like a queen but is as important as a king, i.e., even if your king is OK if this King-Queen thing is captured you lose. Quite a simply one. I would place it next to king on a 10x10 board and place it on the edge of the board for a normal 8x8 board.
