Does Rocket Barrage have a reflexive trigger, and if countered with Repeat, does the counter affect the whole spell or just the Repeat effects?

Ruling: Rocket Barrage does not have a reflexive trigger because it uses "Choose one" instead of "Do this" wording. If countered while using Repeat, the entire spell is countered, not just the Repeat effects.

Nuances:

• Reflexive triggers are specifically marked with "Do this..." wording, as seen on cards like Falling Star or Icathian
• A spell with Repeat is still one spell, so countering it affects the entire spell including all Repeat instances