During a showdown, if player A has focus and plays an Action, does priority stay with A or pass to B? After the chain resolves, who gets focus? Also, when does Ravenbloom Student trigger and is it added to the chain, and does it still trigger if the spell is countered?

Ruling: When player A plays an Action during a showdown, they retain priority and can continue playing cards at reaction speed until they pass priority to player B. After the final effect on a chain resolves, focus passes to the next player (the player who did not own the last effect to resolve). Ravenbloom Student triggers after a spell fully resolves and interjects itself onto the chain. If a spell is countered, it never resolved and was never "played," so Ravenbloom Student does not trigger.

Sequence:

• Player A has focus and plays an Action (added to chain)
• Player A retains priority and can play additional reaction speed cards
• Player A passes priority to Player B
• Players alternate priority until both pass consecutively
• Chain resolves from top to bottom
• After final effect resolves, focus passes to the next player (not the owner of the last effect)
• If both players pass with focus on an empty chain during a showdown, move to combat damage

Nuances:

• Cards with "when you play" triggers (like Ravenbloom Student and Ember Monk) only trigger after the card fully resolves, not when initially played from hand
• When a trigger like Ravenbloom Student activates, it interjects itself onto the chain and priority goes to its owner first
• Countered spells (via cards like Defy or Not So Fast) never resolve, so they are never considered "played" and don't trigger "when you play" effects
• Focus only changes when the final effect on a chain resolves