"Rook to a8."
Carrion wasn't greedy enough to take the white knight on f4 as he knew that it was a sacrifice and if he attacked it with his black rook, it would result in him wasting a move and that would allow Allen to move his pawn to promotion.
And that was why Carrion didn't take the risk in taking the white knight as his black rook heeded his command and moved to the a8 square.
Seeing that he wasn't sacrificed, the white knight was confused as fuck. It wasn't what he had expected and he felt quite embarrassed about how dramatic he was.
"Don't worry, my knight. There will be a time I will sacrifice you for the sake of the White Empire. And your sacrifice won't be in vain."
"Yes, my king!"
Seeing the embarrassment evident in his white knight's face, Allen didn't forget to motivate his white knight and his white knight responded positively.