So I couldn't sleep and decided to design a new champion for LoL while awake. Obviously, since this is a first pass thing, there's likely some serious balance issues. This is an assassin in the vein of Diana and Nocturne, and ideally her play-style is based heavily on waiting and timing the perfect surgical strikes. I'd love to know what your thoughts are, as well as what things stand out as problematic balance-wise.
Tia, the Storm Serpent
Passive: Static Gift
Passive: Static Electricity flows from Tia to all nearby enemy champions within 600 range, causing them to gain Static Charges every 5 seconds. When consumed, each Static Charge deals 5 (+10%AP) magic damage. Maximum of 25 Static Charges. Static Charges do not expire, but they can be cleared by returning to the shop. Tia's basic attacks consume 1 Static Charge each.
Q: Heart of the Storm
Active: (8 sec cd) Tia transforms into pure electrical energy, teleporting to the target and dealing 50/65/80/95/110 (+20%AP) magic damage to all enemies in a 11º cone. Heart of the Storm has 150 range for each Static Charge on the target. Consumes all Static Charges on all targets hit, and has a 0.5 second reduced cooldown for each Static Charge consumed.
W: Electromagnetic Coil
Passive: Tia's basic attacks deal 10/20/30/40/50(+10%AP) additional magic damage. Additionally, Static Charges that are consumed by her basic attacks deal 60/70/80/90/100% increased damage.
Active: (20 sec cd) For 4 seconds, enemies within 600 that are moving away from Tia have their movement speed slowed by 20/25/30/35/40% and gain 1 Static Charge per second.
E: Blinding Flash
Active: (36/32/28/24/20/16 sec cd) Tia releases a flash of light, dealing 50/65/80/95/110(+20%AP) magic damage to all enemies within 250 and blinding enemies that were facing her for 2 seconds.
R: Tempest's Wrath
Passive: Increases the range of Static Gift by 0/25/50%, and grants Static Gift to all allied champions with a 30% reduced range.
Active: (120/100/80 sec cd) Tia becomes a nexus of electrical power, increasing the flow of Static Charge to one every second for 10 seconds. After the effect expires, the passive bonuses are lost until Tempest's Wrath is off cooldown.