[Solved] Need help identifying this icon

[Drufo]

Hi! Recently I played in a public match (Hieracon) with Banshee, Nova and Ember and from time to time this symbol appeared (the one on the left)

When it appeared it said "Reinforce". I've never seen this icon before (or maybe I simply don't remember) and can't find info about it, can anybody help me identifying it?

Edited September 8, 2016 by Drufo

[-N00blShowtek-]

It's the passive of Vauban, the more allies are nearby, the more armor you have.

[DeMonkey]

Don't worry about it, ^ is correct.

The buff is so insignificant that it won't affect your game.

[Drufo]

Thanks guys. Now I understand why I forgot about it XD