What is the symbol with a ! in it over yodas head?

"Taramel;486315" wrote:
@CFCRubens Now that you mention it... I run droids and no one on my squad has an active crit damage up. So how did yoda steal crit damage up, you might be right and he is stealing it from one of my droid passives. Although I always run HK lead so still not sure how he could have stolen it.

Yoda has a penchant for stealing invisible buffs. But don't worry, they fixed that in the 06/15 update. I read about it:

Bug Fixes

• Fixed a bug where Grand Master Yoda's Masterstroke ability grants Offense Up if used against an enemy leader Poggle the Lesser. Grand Master Yoda's Masterstroke ability should now only grant himself visible buff present on enemies.
  

So you must be mistaken, Yoda can't steal passives anymore. They fixed it.