Aerou, The Half-Void
Aerou was a young boy who lived in Zain when he was abducted and used as a test subject for how the void effects people. As a result of this testing a clone of him made of pure void was created. Aerou was then shunned out of zaun and after running away from Zain he became a skilled hunter to provide for himself. Aerou decided that he should join the league of legends to help him learn his powers.
Aerou's passive is called "two for the price of one". Aerou is actually two character one which is him and the other which is his clone. Both him and his clone have 60% of their total attack damage and 50/60/70/80% of their total health(Increasing per rank of ultimate). Aerou does not die until both him and his clone have died whoever when only one is dead they will respawn after 10-30 seconds(gets longer the lare in the game)
Aerou also has a sanity bar instead of a mana bar. Aerou has 200 sanity and using his abilities causes him to lose sanity. Once Aerou loses all his sanity he goes insane and him and his clone start to fight each other until either one dies or after 5 seconds. Aerou gains 10 sanity per second well not in combat.
Aerou's q is called "siphon" which costs 5 sanity per second. When aerou casts siphon he creates a beam of life between him and his clone well active. This beam heals the lower health one by 40/60/80/100/120 (+0.2 ap) per second and damages the higher health one by 40/60/80/100/120 per second. If an enemy walks in between this beam they cancel the healing but are dealt magic damage by 40/60/80/100/130 (+0.2 ap) per second.
Aerou's w is "swap" This ability costs 50 sanity and has a 15 second cooldown. Casting this ability causes Aerou and his clone to switch places and gain a attack speed boost by 10/20/30/40/50%.
Aerou's e is "penetrate". This is a passive ability where when either aerou or his clone attack an enemy he applies a stack of corruption. When the one who did not apply the stacks autos someone with a stack they are Penetrated by the void this increases aerou and his clones damage dealt to that target by 4/6/8/10/12% for 5 seconds or until the target is Penetrated again in which case the target then takes half of the last stack plus the last stack damage dealt up to 3 times for a max of 9/13.5/18/22.5/27%.
Aerou's r is "control". Costs 100/75/50/25 sanity and has a 5 second cooldown. When cast aerou switches to be able to control his clone permanently until the ability is cast again.
Aerou is designed as an extremely high damage marksman being able to deal almost 1.5 times his attack damage when both him and his clone are attacking but as a squishy immobile marksman whem either he or his clone dies his damage is cut to only 0.6 times his attack damage and is unable to use his abilities.