Can multiple action cards be played during a single showdown, and what is the sequence for playing them?

Ruling: Both players can play multiple action cards during a showdown as long as they follow priority/focus rules. Actions can only be played when the chain is empty, and the showdown only ends when both players pass in a row on an empty chain.

Sequence:

• Units enter showdown, triggering any "when I attack" or "when I defend" effects
• These triggered effects must resolve first (actions cannot be played while the chain is not empty)
• Once the chain is empty, the player with focus/priority can play an action or pass
• If they play an action, it resolves, then the other player gets priority to play an action or pass
• This continues with players alternating opportunities to play actions
• Combat only begins when both players pass consecutively on an empty chain

Nuances:

• After an action resolves, the player who did not play that action gets the next opportunity to act
• Passive abilities ("While" effects) do not use the chain and are always active when their conditions are met
• Triggered abilities ("When" effects) go on the chain and must resolve before actions can be played