After Falling Star resolves and targets are reflexively placed on a new chain, does the opponent have priority to respond with Discipline to save a targeted unit?

Ruling: Yes, after Falling Star resolves and targets are reflexively placed on a new chain, the opponent has priority to respond with cards like Discipline to save a targeted unit.

Sequence:

• P1 plays Falling Star and passes priority
• P2 passes priority and the chain resolves
• P1 reflexively places targets on a new stack
• P2 now has priority and can play Discipline on one of the targets to save it