Umbria, Apprentice of Shadows(Marksmen/Ninja)

I thought that it might be a good idea to have a concept for a ninja champion that'd allow for a full ninja team

Description: Umbria is a marksmen with the some of the forbidden arts(from her master ) but much like Taliyah, she has yet to master her capabilities. She uses the art of shadows differently compared to Zed however. She uses a physical kunai and her shadows use a shadow kunai. Energy is her resource and like most ninjas with the exception of Shen, she has 200 energy.

Abilities:

Innate: From The Shadows Passively her auto attacks deal 10% less damage. Whenever Umbria auto attacks a shadow of herself will appear briefly to throw a Kunai at her foe that deals 5/10/15 + 10%/20%/30% of her total attack damage(levels 1/11/16) in bonus physical damage. Additionally, the shadow can critically strike with a 25% reduced crit modifier.

Q: Crippling Kunai COST: 70 Energy Cooldown: 12/11/10/9/8 seconds(starts after second cast) First cast: Throw a Kunai that pierces all targets in a line dealing 40/90/140/190/240(+30% bonus AD) physical damage to the first target and 50% damage to every target afterwards. The Kunai slows the enemies hit for 10%/15%/20%/25%/30% for 1.5 seconds. For 2.5 seconds, you can cast crippling Kunai at no energy cost,

Second cast: You summon a shadow briefly that throws a shadow Kunai which pierces all enemies that does NO DAMAGE but increases the slow by 0%/5%/10%/15%/20% that will decay to the base amount over the duration, also refreshes the slow duration. Unlike the first cast, the shadow kunai has no animation and Umbria can freely move while casting it. Restores 15 energy for every enemy champion hit.

W:Razor Wave COST: 80/75/70/65/60 energy Cooldown: 16/15.5/15/14.5/14 seconds(starts after cast) Umbria readies a wave of shadow Kunais to unleash in a cone in front of her. After, 1.5 seconds the Razor Kunai Wave is unleashed upon her opponents and does 50/90/130/170/210(40% Total AD). Enemies hit are marked with 'Shadows From the Dark' which increases the damage from her 'From The Shadows' by 5%/10%/15%/20%/25%

Does 50% damage against minions.

E:Rising Shadow COST: 70/60/50/40/30 Energy Cooldown: 20/19/18/17/16 seconds Passive: 'From the Shadows' base damage increased by 3/6/9/12/15

Active: Summons a shadow which upon reaching it's designated location, causes Umbria to blink to it. Your abilities reduce Rising Shadows cooldown by 1 second whenever they hit an enemy champion, up to 2 seconds per ability cast.

R: The Killing Mark Cooldown: 120/105/90 seconds Umbria performs her own unique technique based on Zed's 'Death Mark'. She summons two shadows and throws three Kunais, two shadow Kunais and one physical Kunai that criss crosses on the target. Dealing her auto attack damage and her shadows damage, additionally the target is slowed by 50%/60%/70%. After 3 seconds, three shadows appear on the target and throw another wave of Kunai's, and if the target is below 30%/35%/40% health the Kunai's perform a guaranteed critical strike.

LORE+ QUOTES, TOMORROW HOPEFULLY