Anyone have any idea what this is for?

[Azarael]

Aura on rightmost flag. It's invoked within some of the packetlogs from the official server, too.

[Penril]

It was a timer for the BO to spawn a Resource carrier IIRC. Martyr's Square just had a RC sent to the keep, while Armory just spawned his and is waiting for someone to click on it.

The outer "aura" was actually a border-line that was growing until it surrounded the whole shield. At that point the RC spawned, IIRC.

[Halhammer]

Ye, what Grulo said

Edit: while on it, the bars on the keeps should fill up whith each RC arriving, and stars indicating the keep level, think up to 5?

[Penril]

Yes, the bars on top of the keeps show their progress towards the next rank (max 5) and the bars under the keeps are the door's health.

[Tesq]

if the border was right the carrier was avaibale to be click, if the border was yellow (i belive) it was increasing over time before complete all the border and generate a resource