Can you play a card while the chain is in the middle of resolving?

Ruling: Yes, after each element on the chain resolves, there is a window where both players get priority and can play reactions before the next element resolves.

Sequence:

• The chain begins resolving from top to bottom
• After each individual element resolves, both players can add items to the chain
• Any newly added cards go on top of the current chain
• Resolution continues with the new top element

Nuances:

• The phrase "the chain ends" when resolution begins is misleading - it only means players can't add things initially, but priority returns after each resolution
• In the example: after Consult the Past (2) resolves and draws Discipline, Player B can play Discipline before Consult the Past (1) resolves, placing it on top of the remaining chain