Can you hold priority and cast multiple spells in a row during a showdown before passing priority?

Ruling: You can hold priority and play multiple cards in a row, but only Reactions. If you want to play multiple Actions, each must resolve and your opponent will get Focus in between.

Sequence:

• When you have priority, you can cast a Reaction
• Hold priority to respond to your own spell on the chain (it hasn't resolved yet)
• Cast another Reaction
• Repeat as desired before passing priority
• Note: You can opt to play Reactions as Actions if you want

Nuances:

• Focus is the permission to play Actions in a showdown and to start a chain
• Priority is the permission to play Reactions onto an existing chain
• Focus passes when a chain fully resolves or a player with focus passes on an empty chain
• Exception: In combat, after the initial chain (where "When I attack/defend" triggers are handled) resolves, the attacker retains focus rather than it passing