Fox immediately supplants Jimmy Butler atop the list of available game-changers, and Brooklyn sees the Kings guard as a trade target — though sources tell The Post that Giannis Antetokounmpo is still the ultimate prize.

The countdown is about to move within a week of the Feb. 6 NBA trade deadline when it comes to the Miami Heat’s next step with Jimmy Butler. In other words, go-time. For now, the veteran forward remains on unpaid team suspension through at least that deadline,