An idea for a new assassin, Vermilion

As you guys know, we don't have much assassins in league of legends as much as other positions. So, I came up with an assassin champion that would be fun to play. His name is Vermilion, the crimson shadow who is one of the psychopathic ninja who was one of Zed and Shen's master's student. After zed killed his master and other ninjas in Ionia, he was captured by Zed and is now part of his shadow clan who is looking for vengeance on Zed.

He will use energy and he relies on attack damage and armor penetration who will dominate midlane and jungle. Q- When activated he gains stealth for 2 seconds and when it breaks, the champion closest to him will be silenced and slowed for 2 seconds. His next auto attack will make the enemy bleed over 3 seconds. Cooldown: 20/18/16/12/10

W- He throws his shuriken and if it hits the target without hitting the minion he also heals himself for half the damage he dealt. If he misses the target his cooldown is increased to give the enemy breathing room. Range: 1000(this has a bit more range than zed's shuriken) Description: This is his major poke ability in landing phase. Cooldown:7 secs

E- He dashes at the target and deals 70 percent of current AD and deals magic damage over 3 seconds. He can activate e again to go back to the previous spot. Range:700(range of zed's living shadow) Description: This is kind of like le blanc's distortion and is his initiating ability or all-in ability, or maybe you can use it as his main damage source. Cooldown: 11/10/9/8/7 secs

R- When activated, he gains stealth for 5 seconds and leaves a shadow behind where he was before the ability was activated. As soon as he starts attacking someone(with auto attack or ability), he breaks stealth. he can press r back to where he was before switching the position with the original shadow he left behind(p.s. this shadow do not mimic his abilities so don't worry he is not as skilled ninja as zed in the art of shadow) Cooldown: 110/95/80 Description: You can go all-in and r back to safety but then if you don't get a kill or assist with this ability the cooldown is increased by 10 seconds.