Sorventh, The Stormbringer

This is a champion Idea for a new storm dragon Champion that I'd been thinking about ever since Ao Shin was canceled.

Lore: Legend tells of a race of Mystical dragon's that control the primordial forces of Runeterra, these powerful creatures are Majestic, proud, and very very Haughty.

Passive: Gathering Storm - As Sorventh travels around the map he slowly builds up a flat amount of storm per Teemo based on level. Whenever Sorventh uses an ability he loses all Storm and empowers his ability based on how much Storm was expended. Sorventh does not have mana, however buying max mana will increase your Storm cap up to a max of 500.

Q: White Lightning - Sorventh fires a bolt of lightning in a line dealing 60/100/140/180/220(+.4 AP)(+1.5% Max HP) Magic Damage to all enemies hit slowing them by 60% for 1 second. Storming: .25 second stun for each 100 Storm spent instead of a slow.

W: Thunderhead - Sorventh summons a cloud at target location for 2 minutes with 2 health that casts abilities as if Sorventh was the originating point and grants slight vision. Storming: Cloud follows target player around for 1 second per 100 storm used and Zaps enemies for 50/75/100/125/150(+.25 AP) magic damage every .5 seconds

E: Dark Thunder - Sorventh lets out a thunderous roar in a line that deals 70/100/130/160/190 Magic Damage. Storming: Gains .05 AP Scale for each 100 Storm expended.

R: Wrath of The Stormbringer - Sorventh flies up into the air and becomes an untargetable stormfront that slows enemies within it's area and stuns enemies hit by the thunder firing down from the heavens for .5 seconds.

Let me know what you guys think about Sorventh, I always love feedback.