When a chain has multiple items and starts resolving, can players play reactions between each resolution, or must all items on the chain resolve without interruption?

Ruling: Players can add more objects to the chain between resolutions. After each item resolves, priority is passed and players can react before the next item resolves.

Sequence:

• The player who controls the resolving effect has priority first
• Player A passes priority, then Player B passes priority
• The top item on the chain resolves
• Priority passes again for the next item on the chain
• Players can add reactions before each subsequent item resolves

Nuances:

• When an effect resolves (like Stupefy drawing a card), there is no window for reaction between parts of that single effect resolving - the entire effect completes before priority is passed again