Can a player play multiple reactions before passing priority, or does priority automatically pass after playing just one reaction?

Ruling: A player may play as many reactions as they want before passing priority. Nothing forces you to pass priority after playing a single reaction.

Nuances:

• Focus and priority are different concepts: focus is for actions during a showdown and passes automatically when the last item of the current chain resolves; priority is for reactions during a chain and must be explicitly passed
• You must actively "pass" for priority to pass to your opponent
• Focus passes automatically as the last item of current chain resolves and allows the next player to begin a new chain