A variation to the Xiangqi canon: A piece that moves and captures like a rook. It can - and must - jump over one piece if it wants to give check.
Let's invent some very weird pieces

King On Horseback (Suggest Better Name for this.) It Replaces The King. A Royal (Affected by check/mate) piece that moves like a king, but can move one more square in any direction, and has a knight's move.

A piece that can bend any rook-like or bishop-like movement this way:
(like a black hole bending light from other stars).

Yeah, it sounds like a fun feature. Hard to judge without knowing all features of the piece though, such as how it moves and if it affects both allied and enemy pieces.

The analogy with black wholes bending light wasn't entirely correct.
And it's true that this needs more detailed rules.
This piece moves by sliding two squares diagonally or moving like a knight. Whatever piece it captures changes colors and gates up like in Musketeer chess but cannot be counted as a move. The gating needs to be done immediately.
Skunk
This piece can moves by sliding two or one squares. It can also move like a rook. Any unfriendly piece that is one square away from this piece pushed back a square. It captures in a special way. The only way to capture with this piece is to blast a stink diagonally and to the piece you want to capture. The stink can only be launched as capture and cannot go over a piece. Where you spray the stink is considered a stink square for 5 moves. Kings cannot get onto stink squares

A piece that is capable of moving like a queen and knight, but cannot capture any pieces; only check/mate the king

A piece that is capable of moving like a queen and knight, but cannot capture any pieces; only check/mate the king
A knight-rook compound to which all non-royal pieces are immune. Nice idea.
But when I step onto the enemy's royal ghost's square then i've captured it or not?