A possible champion idea for midlane

I've been trying to think if a champion idea that league hasn't really done yet, in terms of the different ways that they attack and what their spells are like. There's already fire, water, air, earth, lightning, energy, magic, death, etc. One thing that I've noticed is there's one thing, one type of attack that riot hasn't quite used yet. That type is... Well nothing and its manipulation. For those that might not know, nothingness manipulation is the ability to take something away, like it never existed, be it the enemies health, their movement speed, their dreams, etc.

Now, a possible lore that I've thought of was that this champion was an ancient evil that was barely managed to be sealed away. They were sealed in a powerful magical scroll that those that sealed them hoped could easily be lost, destroyed, and forgotten... Until came along and found the scroll. He realized the great evil within the scroll and keeps it permanently on his back to protect it from those who would release this great evil. However, by being brought to summoner's rift and being exposed to the violence and death on the fields of justice, the great evil entity is released. It now roams the lands, looking to destroy anything it can.

I've also thought of some abilities that may or may not be used. I've left everything open, names, values, etc. to provide any kind of variation:

Passive: Every three hits with a damage dealing spell will proc a reduction to the resistances of the target, as well as a slight damage pop.

1st ability: The caster deals large damage in a line after channeling for a short duration.

2nd ability: The caster casts a point and click slow on a target, that... Well... Slows the target by a large percentage

3rd ability: The caster removes the distance between them and a target location, allowing the target to blink to said location within a small range

Ultimate ability: The caster creates a black hole at a target location that deals massive damage and slows target caught inside. Those closer to the center receive greater damage. If the slow stacks three times, the champion is slowly drawn to the center of the maw of nothingness.

I tried to keep an idea of taking something away from a target. If there are any suggestions for names of abilities, or a name in general, it would be great. I hope that this could be a champion that riot may use if they so choose. All input is appreciated, even the "wow this sucks" kind of input. Thanks for reading this.