Can a player regain focus after passing it, and when does the back-and-forth end?

Ruling: Focus passes back and forth between players until all players pass focus consecutively without playing anything. When everyone passes consecutively, the item resolves.

Sequence:

• Player with focus can take actions or pass
• If they pass, focus goes to the next player
• If that player takes an action or something resolves, everyone "un-readies" and can respond again
• This continues until all players pass consecutively without anyone playing anything
• Once all players pass consecutively, the item on the chain resolves

Nuances:

• Passing focus is like saying "I'm ready for this to resolve"
• Taking any action or having something resolve gives everyone a new chance to respond to the new situation