Pandur,
did you find Siva? in reapers coast? That was the mission Malady gave you. I had the same issue in that I started running around exploring, sneaking past trolls, etc and found myself fighting waves of void spawn coming from rifts 2 levels above me...so I backtracked to first town and got back on track with Siva quest....once you help her you should have plenty of source from what I saw in laboratory.