Well, you probably wish to see a Diablo version of a Black Hole here. It definitely rocks. But I must say, despite the fact current BH has limited usage, I stand strongly against making its effect same ultimately unavoidable. Back in old days this spell was broken as hell due to its ability to soak no matter what and keeping it at one point. I had some ideas and thoughts about it.
It’s my own opinion of course. But I think that pulling and freezing (+ blind) is pretty good alternative which may become very effective after some balance changes.