After a battle is initiated and a chain resolves during the showdown, can the opponent start another chain with an action before the battle resolves?

Ruling: Yes, after a chain resolves during the showdown, the opponent can play an action (like Disintegrate) to start another chain before the battle resolves.

Sequence:

• Opponent begins a battle
• Defending player plays Stupify, chain resolves
• State opens but battle has not resolved yet
• Attacking player can play Disintegrate to start a new chain
• Battle only resolves when both players pass focus without anything happening