Demand upon reaching an "enemy border"

KINGME

Think of what you might shout when your piece in a classic board game moves to the opponent's first row.

This clue plays on the phrase "king me," which is called out in checkers when a piece reaches the opponent's back row (the "enemy border") and gets promoted to a king. The word "demand" hints at the exclamation itself—what you say to upgrade your piece. It’s a clever mix of game terminology and a literal "border" as the far edge of the board.