Chesspiece competition: create a NEW CHESS PIECE AND WIN!!!

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KingkeyaanR
Let's see who's gonna win!
SacrifycedStoat
Time bomb:
Moves like a king.
It replaces your queen at the beginning of the game.
It can castle.
On move 51 and after, it can jump anywhere on the board, instantly checkmating unless it can be captured.