Can you interrupt a chain after each item resolves (like Magic) or must the entire chain resolve once started (like Yu-Gi-Oh)? Also, when must Zhonya's be revealed - before or after damage assignment?

Ruling: After each item on a chain resolves, there is a window for players to react. Zhonya's must be revealed before damage is assigned, as there is no reaction opportunity during or after damage assignment.

Sequence:

• Players can add to the chain after each item resolves
• Combat damage is assigned at the very end of combat after both players have passed
• Zhonya's must be revealed (if hidden) before this damage assignment step
• Once Zhonya's is face-up in play, it automatically saves the next unit that dies (not a choice)

Nuances:

• If Zhonya's is already face-up, you cannot choose whether to activate it - it automatically saves the next dying unit
• If multiple units die simultaneously, you can choose which one to save
• You always need to reveal Zhonya's before knowing how your opponent will assign damage