New champion ideea: Kur'Zra

I have some champion ideeas and i hope i can help riot design new champions or at least give them some ability ideas. But at they're abilities i haven't taught about they're duration or dmg so i put X where the value is supposed tp be.

Lore: Kur'za: The Lord of The Void. Kur'Za it's a mage that uses his mistic sword to bend void energy. As one of the first people who descovered magic he also discovered the void magic. An unstable but strong magic. He wanted to use that magic for the good of runeterra but by using it his mind twisted becoming obsessed with power and destruction. The other mages couldn't kill him but they mannaged to sent him into another dimension. A dimension who had nothing in it. And the magic there was exactly like the magic he used. Becouse of that he was able to create a lot of beasts that were under his comand and then he mannaged to open a portal. But he didin't come back. He sent his beasts. And of all beast he created the most important were Rek'Sai(because she was able to give birth to other creatures) and Vel'Koz. The one he sent to gather as mutch intel as he could. And after all this time to leave his home, the void.

Abilities:

Passive(Magic Sense): Kur'Za is able to sense any champion within X units that is using a spell(including summoner spells) or that are under any type of temporary buff(exept Blue,Red, Elder Dragon, Baron, and Herald buff)

Q(void pull):Kur'Za uses magic to pull enemies towards him, deal x damage and slow them for X seconds, this ability has an area effect and the shape of the cone that means this ability can work on more enemies. But he doesn't pull them a long distance just a small one. So only if the enemies are close to him he pull them right where he's standing.

W(Blade Slash): Kur'Za Swings his sword in front of him dealing damage to all champions in range. And the shape of the hit box is like a hald of a circle.

E(Coind Shield): For x secs Kur'Za makes a protective circle around him that folows him everywhere he goes for x secs and him or any ally takes X% less damage(doesn't affect true damage).

R(Void Corruption):Kur'Za puts his sword into the grownd unleashing a shockwave in a targeted direction that deals x damage and leaves a crack in the ground that is full of void energy that lasts for x secs, deals X damage and slows X%.

Appereance: He wears a grey armor. He has a purple stone in his armor chest side. He has huge purple wings. His skin is light purple and his eyes and hear are dark purple. And he has a huge sword that looks a little like Rivnen's sword(when she ults).