@Riot, idea to complete the Void Senses Group while also adding a support.
Currently we have:
Kog'Maw / Cho'Gath - Taste
Vel'Koz - Sight
Rek'Sai - Sound (Tremor Sense is based on soundwave vibrations)
Kha'Zix - Smell (Kinda pushing it here, but he "Smells" when enemies are isolated).
We just need a "Touch" void champion. We also need an official support champion from the depths below... Here is my idea:
Kra'Kul, the Grasp of the Void
Purple Kraken with 10 tentacles. Tank utility support. His one mission is to pull anything he can into the void.
Here is my concept I made for him awhile ago, but I think it would be of use now.