This is my first Champion Concept. Is it good?

Name: Hagane Zetsu

From the Extreme Darkness of the Shadow Isles emerges the master of shadows. He is a ninja that specializes in Stealth and has extreme speed after training for years with the heaviest Steel Chains ever invented.

Passive: Clone Assault. When Hagane is below 25% health, he creates 3 clones They increase his Attack Damage by 3% each and deal 5% of his Attack Damage as magic damage to the target that he attacks. the clones disappear after 3 seconds.

Q) Cardiac Assault- Hagane Dashes through enemy targets, dealing 50% bonus damage to minions he passes through and (30/50/70/90/110 Attack Damage) (+80% AD) (17/16/15/13/11 Second Cooldown) (150 Energy)

W) Chain Assault- Hagane Tosses his Chain to stun the enemy for (0.5/0.75/1.25/1.50/1.75 seconds) He then uses his blinding speed to slash the enemy 3 times while they are stunned. each slash deals 25 Physical Damage and the third slash causes the target to bleed, losing 3% of their max health per second for 3 seconds. (20/19/18/16/14 Second Cooldown) (100 Energy)

E) Shadow Assault- Hagane Releases a Shadow of himself that is 350 range away from him It attacks nearby enemy champions 3 times before fading.(7/5/4/2/1 Second Cooldown) (50 Energy)

R) Infinite Darkness- The Map becomes dark for 3 seconds. Hagane gets 30% bonus movement speed while he is within the darkness. Champions that are trapped in the Darkness are Marked. When Hagane is within 1000 range of his Targets, they are alerted by a Exclamation Mark above their head. Once within 1000 range, Hagane can Dash 3 times dealing 15% of his Attack Damage as True Damage to struck Targets. (200 second Cooldown) (No Cost)