Ninja ADC? Champion Concept

First time posting! Currently still in progress, but here goes:

No name yet, feel free to suggest ideas and even lore. I personally would like to see a female ninja, doesn't have to be. Skill names are also subject to change, again feel free to suggest some.

My goal is to create a ADC ninja (I know ADC Kennen exists or existed) with some flashy or ninja like abilities. I had used to play a different MOBA up until a few years ago when I started LoL (due to shift of friends playing different games). I missed some Hero abilities and I thought I could attempt to create something I'd like to see in LoL one day.

Base Stats Health : 520 Health Regen : 5.7 Energy : 200 Energy Regen : 50 Range : 525 Attack Damage: 50 Attack Speed : 0.6 (To account for the bonus attack speed at the start) Armor : 23 Magic Res. : 30 Mov. Speed : 320 (To account for the bonus movement speed at the start)

Again, numbers are also subject to change, but feel free to comment/criticize as is. Skills: -Unyielding Resolve: [Passive] Gain 6/8/10% (+2% x Relentless Stacks) attack speed and half this amount in movement speed.

-Flash Kunai [Q]: [Cost: 80, Range: 800, CD: 12/11/10/9/8 seconds]

Active: Throws a kunai which lodges itself to first enemy or wall hit. If enemy is hit, the kunai deals 30/45/60/85/100(+ 20% of bonus AD) physical damage.

If the kunai hits a enemy or wall, within 2 seconds, you can reactivate this skill to teleport to the kunai, dealing 50/70/90/110/130(+ 40% of bonus AD) in a 250 radius. If you teleport to a enemy Champion, this skill cooldown becomes 2 seconds and restores 20/25/30/35/40 energy. Skill does not go on cooldown until kunai misses, the lodged kunai wears off, or until you reactivate the skill.

-Vanishing Strike [W]: [Cost: 110/100/90/80/70, CD: 18/17/16/15/14 seconds]

Active: Throw a smoke bomb underneath you and backflip in target direction 375 units away and throw kunais at the original area (250 radius) that snares all enemy Champions in that radius. Enemies inside the smoke bomb have their vision reduced to 350 radius and lasts 2 seconds. Snare lasts 1/1.25/1.5/1.75/2 seconds. Note: May change to "facing" activation, where you would literally move the opposite of which you are facing.

-Relentless [E]: [Cost: 60/55/50/45/40, Range: 600, CD: 8/7/6/5/4 seconds]

Passive: On every basic attack, gain a stack of Relentless, 2 stacks for Champions (can only increment once per attack, so no Runaan's Hurricane). Gain 2/2/4/4/6 bonus attack damage per stack (Max stacks of 5). Lose a stack every 6/8/10/12/14 seconds, but all stacks are refreshed upon gaining a stack.

Active: Throw (Relentless stack) kunais in a line in rapid succession pierce all enemy units hit, each dealing 80/90/100/110/120% of attack damage and each kunai once applying on-hit-effects to first unit hit. Using this uses all Relentless stacks.

-Flash Counter [R]: [Cost: None , CD: 6 seconds]

Passive: Max Relentless stacks increases by 1/3/5.

Active: Has 1/2/2 charges. Gain a charge every 80/80/60 seconds. For 1 second, negate the first enemy Champion basic attack or ability that hits you, dash to that Champion, dealing 100/150/200(+40% bonus AD) and stunning it for 1+(0.1xRelentess stacks).
Additionally, for the next 5 seconds you gain max attack speed for 5 seconds or for next 5 basic attacks.
If counter does not proc, reduce charge time by half, but cooldown becomes 20 seconds. Note: Gain a charge on skill level up.