I thought of a new ult for Malzahar for a hypothetical rework

I want to start this off by saying I don't want Malzahar to lose his current ult. It's the biggest middle finger in the game to the flashy dashy shit that the raging 12 year olds flock to and call themselves good at the game.

Anyway the new ult idea I came up with is something I would like to see when Malzahar's turn for a VGU comes if he can't keep his current ult. It's something I thought of while working on a rework idea for him. I wanted to play up his identity of being the premiere mobility killing mage. I'm not going to end up using this, but I wanted to share it nonetheless.

> R- Extinction Prophecy Malzahar summons a huge black hole, dealing a medium amount of magic damage and slowing enemies by a flat amount of movement speed per second. Enemies in the middle of the black hole are stunned for the duration, taking double to damage per second as true damage. Enemies who attempt to dash, blink, teleport or have their movement speed dropped to less than 100 while inside of the black hole are sucked into the middle. Minions sucked into the center are executed instantly. Enemy champions killed by this ability refund 15% of this abilities cooldown, while assists refund 10%.

I'd like to see Riot use an ability like this sometime. A giant black hole sounds like a cool ability nobody has yet.