So I was watching over the HD E3 gameplay that was released and when I was watching I noticed that every time the warlock was hurt his hands would glow after for a few brief seconds, now I also paused to make sure it wasn't my eyes playing tricks on me but when I looked it was there and his special ability was only half-way recharged. What also strikes me as interesting though is that while you watch Darla play as the Hunter there doesn't seem to be a 'recharge' effect. So I'll just leave this here for you guys to talk about.