In FFA modes (1v1v1, etc) during a showdown, how is priority/focus passed?

Ruling: Priority and focus are passed in turn order, starting with the player who has priority, regardless of which players are currently controlling units at the battlefield.

Sequence:

• Priority passes in turn order (regardless of game mode)
• Focus passes to the "next player" when a chain resolves (next in turn order)
• When players pass rather than start a new chain during a showdown open state, focus continues to pass in turn order

Nuances:

• The initial chain order for triggered effects at the start of a showdown may differ from turn order, but priority/focus passing during the showdown follows turn order
• Going later in turn order can be advantageous for reactions since reactions played later resolve earlier on the chain