During the fight with the Black Bishop, he offers the following:
The game is afoot! But you are a mere pawn, whereas I am ... THE BLACK BISHOP! The Bishop moves diagonally! Bishop threatens pawn... Check! The game isn't over yet...
The Bishop does indeed have a diagonal teleport ability.
Upon his own death, the Black Bishop says:
Pawn ... takes ... bishop ...
The Black Bishop's shields dissipate as the wretched traitor breathes his last.