I created a New Champion, Can it be used?

Name: Typhon “The Disease”

Passive: Infection- When Typhon touches a target with an auto attack or skill, 1 stack of infection is placed on that target and it wears off after 2 seconds. When Infection reaches 6 stacks, Pandemic is activated and becomes available for use. Also if Infection reaches 6 stacks, it wears off after 5 seconds. Any player that has 6 stacks of infection, can infect allies close to him and the wear off resets. (No Cooldown)

[Q] Trichloric Acid- Typhon Gushes out a Liquid within 300 range of him that slows targets in a small AOE radius and burns dealing 3% of the Target’s health as Magic Damage per second for 3 seconds and applies a 20% slow for 2 seconds. Trichloric Acid deals 90% more damage to minions. [14/12/11/9/8 Second Cooldown] [75/80/85/80/75 Mana]

[W] Diseased Arm- Tyohon’s Next Auto attack is empowered, and it deals 30% bonus damage to Epic Monsters and Turrets. The Cooldown is lowered by 2 seconds every auto attack. [17/16/14/12/8 Second Cooldown] [No Cost]

[E] Toxic Splash- Typhon Expells Toxic Fumes within 300 range around him 2 times. The First splash extends his auto attack range to 550 for 3 seconds and deals 5% of the targets health x Level as magic damage, The Second splash reduces The Target’s Attack Speed and Movement Speed by 50%. [14/11/8/7/5 Second Cooldown][50/55/65/70/75 Mana]

[R] Pandemic- When A target reaches 6 stacks of Infection Pandemic is available to use. When used Poisonous Missiles Fires to all infected targets at a Global range. that cannot be dodged unless the enemy is untargetable. Missile Speed ranges from 1500 to 6000 depending on the distance of the target from Typhon. Pandemic deals 60% of the targets missing health+3% of Typhon’s Ability Power as True Damage. [150/125/90 Second Cooldown][140 Mana]