Ah, forgot about the sustain.  It'll be a little while before I can make a post again (going to be busy most of the day), but if Ixy gets back, the thrall hit by your breath is dead, and the berserker is not bloodied.<br/><br/>Anyway, you are correct that you don't provoke opportunity attacks with the breath.  Any Close or Melee range power doesn't provoke OAs.  Area or Ranged powers do, however, regardless of what you're targeting with them.  As an aside, Reach doesn't let you take OAs against enemies that aren't adjacent to you, unless it's Threatening Reach (which very few monsters have).