If a player retreats their last unit during a showdown, does the showdown immediately end or do players continue to get actions?

Ruling: The showdown continues even if there are no opposing units. It only ends after all players pass Focus in succession.

Sequence:

• Combat once started will resolve even if there are no opposing units
• When the last item on the chain resolves during a showdown, Focus passes to the next player
• Players continue to have the opportunity to play spells or activate abilities
• The showdown only closes if all players pass Focus without playing a spell or activating an ability

Nuances:

• Focus does not pass when the last item on the Initial Chain resolves; instead the player with Focus proceeds with play