Zixis, The Young Pyromancer

Hey all, just wanted to throw out an idea that was in my head. I feel like we don't have enough mid laners that can knock up or knock back to set up Yasuo ults and knock back to start or delay team fights. As for me, I like to play champions that have pretty strong engage / disengage and hold the possibility of having a decent burst. I'm not much of a lore writer or graphic artist, so instead of me writing a pretty bad story about this guy (or going on paint and drawing a stick figure with a fireball next to it) I'm just giving out the abilities and seeing what the community thinks.

Abilities:

Passive: Third Degree Burns: Zixis's spells and auto attacks cause the enemy target to burn for an additional (5%AP) over the next 3 seconds. Any additional damage towards the enemy target causes the damage to stack.

Q: Magma Spike: Zixis releases a burst of intense heat that knocks back all enemies in front of him dealing (scale lvl) + (75%AP) in magic damage. -Scaling: 40 / 60 / 100 / 120 / 150 -Cooldown: 12

W: Magma Jet: Zixis summons a jet of magma towards target location knocking up all enemies within the target area and dealing (scale lvl) + (75%AP) in magic damage. -Scaling: 60 / 80 / 100 / 120 / 150 -Cooldown: 10

E: Path of Fire: Zixis slides toward a nearby target location leaving a trail of fire on the ground dealing(scale lvl) + (40%AP) per 3 seconds. The trail lasts 3 seconds. -Scaling: 50 / 100 / 150 / 200 / 250 -Cooldown: 15 R: Burning Soul: Zixis becomes submerged in lava and flames dealing increased magic damage by (scale lvl Damage Increase %) to all enemies hit with spells and auto attacks. This effect lasts for 5 seconds or until cancelled. Upon the end of the effect Zixis will shoot out a fire nova dealing (AP) + (scale lvl) to all enemies in a large radius -Scaling: 100 / 200 / 300 -Damage increase: 1.2x / 1.4x / 1.6x -Cooldown: 80