In a closed state, can a reaction be played after the last card/ability in the chain resolves?

Ruling: The chain ends once the last card resolves. A reaction card drawn during the resolution of the last card in the chain cannot be played within that same chain.

Sequence:

• The last card/ability in the chain resolves completely
• If the chain is now empty, play proceeds in an open state
• If there is currently a showdown, focus is passed to the opponent where they have the opportunity to start a new chain

Nuances:

• Even if a player draws a reaction card as part of the resolution of the last card in the chain (e.g., drawing 2 cards from Hidden Blade killing a unit), they cannot play that reaction within the same chain