Neon

This is it. There is no turning back now. This being is not going to let you pass. If you don't try to beat it, you will survive. This is still being worked on.

What is Neon
Neon is a difficulty beyond a normal difficulty. It has been stealing obstacles from the other Great JTOH Fan Difficulties for thousands of years but very slowly. When the Omniverse was born, so was a single neon sign. When the first towers where made, part of their obstacles from them and their own difficulty was stolen by the neon sign. When it became hard enough it came to life, and began consuming more and more obstacles, making it slightly harder all the time. The difficulties now are a shadow of how hard they used to be due to this. This is an Omega difficulty and is twins with The Hardest.

Obstacles
It isn't clear what the obstacles are now, but it's around the googol stud jump mark. We also know that the jumps are probably on Ban Bricks.

Icon Representation
It is a classic picture of something made out of the element called neon.