Champion Concept: Natina , The Mystical Mercenary (ADC)
So Natina is female champion designed to be ADC (probably can also be jung,mid) with big blaster and unusual (as always) skills. (more info if people like it)
Passive:
On level 6,12,18 your spirit and doppelganger receive 10% more of your current hp , up to 30% and Natina receive 20% attack speed, up to 60%. (also up to 30% more of her armor and magic resist for her spirit and doppelganger if you decide its fair)
Q/
Natina launches fast her spirit forward (like Azir's Q) damaging enemies in its path, but since its her spirit he doesnt have her blaster , he is melee and does 50% of her dmg (since Natina's item bonuses such as dmg , attack speed and crit work on him too) and cannot move (when you spawn the spirit he is always 50% of her current hp, armor and magic resist and able to take dmg) also he remains on his position until killed or replaced with Q/ (every use of Q/ respawn him with 50% of current hp) he cannot be manipulated in anyway to attack your preferable targets, instead he hit targets with lowest hp (focusing champions) and every 3rd hit on same enemy champion (during the spirit is alive or recasted or the enemy champion die and reset those 3 hits) stun for 0.25 sec.
W/
Natina commands her spirit to sacrifice and explode dealing damage in area and knocking enemies back , also decent % of damage done to champions from the sacrifice goes to Natina as hp. (since i doubt she will do "huge" dmg we can afford the hp from sacrifice , also champion kills with this skill reset the skill (doesnt work with assist), cuz i guess there will be decent cooldown, also considering the fact that she is adc and this skill is useless unless she use Q/ first, which can be useless too if you are on very low hp, i think she deserve it:D)
E/
Natina becomes invisible for 0.25 sec and splits to two Natina's for ? seconds (like leblanc or shaco) both Natina look the same to enemies and your doppelganger has the same attack speed as you, also you can move fake Natina with ALT ,if not she moves around simulating "real person" and attacks closest targets (focus champions in range and doesnt do any damage but marks the target instead (champions only) also you can reactivate the skill during your doppelganger is alive to switch places with him(the cooldown shouldnt be affected by the reactivation (not sure if i say it right but what i wanna say is that your cooldown should start when you cast it and while its timer goes you should still be able to use reactivate only if he is in range )) the idea is this skill of hers to be decoy , also she can be helpfull for killing tanks , but her doppelganger has only 20% of her armor and magic resist and the hp of the doppelganger just appears to be same as hers, instead its only 20% of her current hp.
Each mark lasts for 3 seconds and those 3 seconds reset if you are hit again , stacks up to 3 marks and enemy champions lose 10% of their armor and magic resist for each stack, up to 30%. (this works only for Natina. allied champions still do same dmg to marked enemy, but when ally champion hit marked target with basic attack the mark remains 1 additional second, this can go forever, but it doesnt add additional stacks if you had 1 it will remain 1 , just for longer time)
R/
Natina upgrades her blaster and she is able to hit all targets in range for ? seconds for 100% dmg (can crit and apply effects) doing additional 10% of damage done (to champions) as bleed over 3 seconds , hitting marked targets while ultimate is active slows them for 0.5 sec. (if your E is active your doppelganger copy your ult (still no dmg) and marks all champions hit)
I decided to use this ult because i think its decent for ADC and i already proposed it as basic skill on this strange ADC http://boards.na.leagueoflegends.com/en/c/skin-champion-concepts/GE042ZWn-champion-concept-roxx-the-knowledge-keeper , but no success :D So lets hope its better as ult.
Let me know what you think , all opinions and suggestions are welcome.