I think, of it was a cheap way to dodge teleport blockers, I wouldn't have mentioned this until there was, in fact, a teleport blocker.
Actually, it can be stopped by anti-teleport wards, but only rather strong ones, as it is a powerful artifact. I don't classify it as teleportation because in my opinion, teleportation requires warping of time space. What the artifact does is more like walking up to Reality and shouting at it about how you're supposed to be there, not here, and it better fix it, now!