How does priority and spell casting work during a showdown in Riftbound, specifically regarding when players can play actions and reactions, and when the showdown ends?

Ruling: During a showdown, the active player has focus and can play actions or reactions without automatically passing priority - they can cast multiple spells before passing to their opponent. The showdown ends when both players consecutively pass focus without starting a new chain.

Sequence:

• Player with focus can play an action spell
• That same player can immediately play reaction spells (or more actions if they have focus) without passing priority
• When they choose to pass, opponent gets priority to react
• If opponent passes without reacting, the top spell on the chain resolves
• After a chain resolves, the player who started that chain gets focus again
• Focus passes back and forth with each player able to start new chains
• Combat ends only when both players pass focus consecutively without starting a chain

Nuances:

• You don't automatically lose priority when playing a card - you must explicitly pass
• You can react to your own spells as many times as you want before passing
• Each resolved chain "resets the clock" on the combat, giving the initiating player focus again