The Necromancer: Replaces black's king, behaves exactly like black's king in terms of movement, but any capturing move he makes converts that piece into your piece of the same type. The captured piece remains on its same square and the necromancer stays on his same square. Thus if he's in check and his only escape square is to capture an enemy piece, since that capture would keep him in the same square, it's checkmate instead.
CREATE THE BEST/WORST CHESS PIECES

DIO for black and Jotaro for white: Replaces the kings. If you choose to move him, he can stop time which allows him to make any two legal king moves in the span of one turn. Since if DIO has time stopped Jotaro can also move in stopped time, rather than two sequential moves white can choose to move Jotaro between both of DIO's moves. This prevents both kings from checkmating each other since they can't use their second move to checkmate.

It moves and captures orthogonal. Any opponent piece next to it turns into a piece of the player with that claiming guy.

It moves like a rook, and it gets replaced by a pawn when it captures. The pawn that replaces a car behaves like a normal pawn.

The Pounder A COMplete win if chess peices are made out of jelly the punder pounds the jelly and creates a jelly gun and checkmates the king

Moves diagonally 2 or 3 spaces and captures like a rook.
Any other piece next to it is paralyzed.

The god,it can move anyhow,like can jump over pieces can capture multiple pieces at once and it gives checks like the queen and can never be taken

It can be placed anywhere on the board at the start of the game, any opponent’s pieces next to it is paralyzed. It can only be captured by a knight.

a marksman... only moves diagonally but captures straight. it can only move a maximum of 3 squares per play and is worth 3 points

It moves and captures diagonally, but it goes over other pieces in its path.

ALL: Moves like all the pieces!
Lusitania: If the piece gives a check, it clears both the checked player's rooks!
OLYMPIC: If this piece captures anything of the opponent, the it clears all the opponents pieces 3x3 with OLYMPIC in the center [the piece is exactly the same as a White Rook in the chessbase 15 oldstyle piece theme so regard the rook as OLYMPIC]
Ex.
All the squares next to the rook [e4, d4, c4, c5, c6, d6, e6 and e5] are no man's land [if there's any piece of the opponent there, then that piece goes off the board including pawns].
I have chosen Lusitania because it was thought that this ship could outrun any submarines, but it was torpedoed on 7th May, 1915 killing around 1200 out of the 1900 on board.
Olympic is chosen by me because it successfully depth charged an Imperial German Navy submarine.
https://en.wikipedia.org/wiki/RMS_Lusitania
https://en.wikipedia.org/wiki/RMS_Olympic
and that's all.
Otherwise I don't want you to imagine how much the Lusitania's passengers suffered.
You can search 'Lusitania' and see the videos!
and how the U.S jumped into WW1 after the sinking, but sinking the ship wasn't a mistake, though.

I didn't read through this whole thread to I can't say if I got someone else's idea.
Worst piece: A chess baby that is like a pawn, but can't promote to anything.
Best piece: chess prayers that moves like a queen, but can also move like a knight.
It moves like a king, but it cannot capture.
If a pawn is blocked by a promotion wall, then it immediately goes in pawn promotion(that is, when a pawn reaches the end of the board, it can turn into any other piece except for the king).