A game is broken or unbalanced if it becomes clear that spamming a particular move, taking over a particular location, or employing a particular tactic makes everything else in the game irrelevant.
as if darkness, / growing thicker every moment, / were filling him.
Diana had held jewels and diamond crowns; she wasn't impressed by an oval of copper and scrap inscribed with a seal and three-digit number. Things men held dear never ceased to amaze her. Dutifully she said, "It's quite lovely."