Yeah, that’s really puzzling to me as well, @Harkonis. I use Magik a lot and I’ve never seen Limbo Portal or Gather work like geewhiz describes. I wonder if he got some passive equipped that we haven’t seen?
I believe my Magik’s passive is a 10% chance to draw a Limbo Portal when her Limbo Portal is used. Which is more or less what you’re describing.