http://sc2pod.com/img/gallery/698.jpg
What's that green bubble on the BC?
And, by the way, what's current number of maximum Interceptors per Carrier?

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Q u o t e:
http://sc2pod.com/img/gallery/698.jpg
What's that green bubble on the BC?
And, by the way, what's current number of maximum Interceptors per Carrier?

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The green bubble on the Battlecruiser in the screenshot is Defensive Matrix.
Defensive Matrix surrounds the Battlecruiser with a shield that can absorb 200 damages and it expires after 20 seconds.

Currently Carrier can have 8 or less Interceptors. Initially Carrier has 4 Interceptors and you can train 4 more Interceptors. You can do right click to activate auto-casting of training Interceptors.