I read in some post that the ‘void rift’ is just a brief flash of puple concentric waves, but I can’t see it at all. For me it seems that the ability just smashes an AoE and that’s it. Even if several mobs die from it, I can’t see any other effect. If it’s indeed there, it certainly is too brief and too hard to notice.
Another post mentioned that it was adjusted to be more visible, but unless I am torally missing something, it’s just not visible or not present at all.