When an opponent reacts to Falling Star's second damage with Fight or Flight (moving a unit to base), does the unit heal before taking the second damage?

Ruling: No, the unit does not heal. Units only heal at the end of combat and end of turn, not when a trigger resolves in the middle of combat.

Nuances:

• Even during combat, units don't heal between damage instances
• Healing only occurs from specific card effects, end of combat, or end of turn
• Special cleanup does not occur when a trigger resolves mid-combat