Does retaining priority when you control the next item on the chain mean you can play multiple reactions back-to-back in a showdown before passing priority?

Ruling: Yes, when you play a spell, you retain priority and can play reactions back-to-back as many as you have resources for. Once you're done, you pass to the next player who will have a chance to play reactions.

Sequence:

• Player plays a spell (Action or Reaction) and retains priority
• Player can play additional Reactions to the chain without passing
• When ready, player passes priority to opponent
• Opponent can now play Reactions
• Once all players pass in succession, resolve the topmost item on the chain

Nuances:

• You cannot respond to an Action card with another Action card - Actions must start the chain
• A chain can only be started by one item
• Focus and Priority are different: Focus allows you to start a chain during showdowns (play Actions or Reactions when chain is empty), while Priority allows you to play Reactions when there's an open chain
• Focus passes automatically when a chain finishes resolving during showdowns
• When you pass priority during a chain, you retain Focus