Dialos, the Devil's Grin
Just an idea, I don't want to elaborate broadly. Feel free to expand it and develop it and post it however you like it to be. ( Also note this is my first post :) )
We had chemists (singed), explosive scientists (ziggs), geinous engineers (heimerdinger), visionary extremists (viktor), even mechanized abominations (urgot), but we never had a bioengineer and yes it's quite different.
Story: My character is a young male (lets say around 25) originating from Piltover. Brilliant and revolutionary he aimed to surpass the mortal limitations by the means of self-alteration to the core of our biology. His ambitions were too great and colided with Piltover's ethics therefore he sought refugee to the closest place his experiments would be allowed, Zaun. There he offered physical augment with his knowledge of bioengineering and quickly rose in rank and favor. One day he heard rumors of two very unique individuals with unique physical properties, one called vladimir and another called Swain. He traveled to noxus to learn more about them. Offering his expertise in the noxian army got him close to the commander Swain. After he convinsed him to examine Vladimir's blood and swain demonic physique he betrayed them and used had he learned for himself alternating his body into a demonic creauture that can suck the blood of its victims.
His monstrous organism has rapid powers of regeneration, he can create parts like arms or mouths in any place of his body at will and can extent them and his devilish form bares a wide diabolical sinister grin on top with many edge sharp niddle-like teeth lining it that can suck a person dry.
I wanted him to be someone that can heal a lot of damage periodically (like a combination of vladimir and swain) but also deal a lot of seperated damage if you can multitask and have quick fingers.
Abilities: To do that I thought lets give him sucking hand (wurm-like https://orig00.deviantart.net/1eda/f/2013/030/0/7/gorge_wurm_by_samburley-d2cvi8r.jpg ) in his q but only when he ults. His ult will be quite similar to swain's ult where he turns into him ultimate form. The difference is that now his abilities will change instead of the ult doing the autonomous work.
PASSIVE (Devilish grin): At close (melee) range Dialos' basic attacks gain 10% lifesteal and bonus attack damage. At close range only the second cast of his q can apply. The active effect will not apply on close target, only the passive ability. Also Dialos can auto atttack both close target and distant target if he has his q's active effect enabled.
Before active ult: Q(Devilish Hands): Dialos extends a hand from his body striking target enemy. The attack does not apply on-hit effects but benefits from lifesteal. Afterwards, for the next 1/2/3/4/5/6 seconds his basic attacks gain a bit extra range extra damage and 10% lifesteal. The cooldown and manacost will be a bit low so he can harass, farm and sustain damage. His overall range will be inbetween a ranged and melee champion similar to rakan so it won't be too much. W(Devilish Feet): Dialos leaps towards target direction (small leap).Afterwards, for the next 1/2/3/4/5/6 seconds Dialos gains 10% bonus movement speed. (again small cooldown/manacost so he has chances to dodge and run but 10% isn't much so its balanced I think) E(Devilish Body): Dialos gains a shield that absorbs physical damage and lasts 1 second. For the next 1/2/3/4/5/6 seconds Dialos after the shield breaks Dialos heals for 10% of all magic and physical incoming damage overtime. ULT: PASSIVE (Equal Form): Dialos can't spend level points on his ultimate. Instead he can spend one extra point on each of his other abilities. Also none of his abilities can have a difference of 2 or more ranks. (That restricts you from maxing one abilitie. Instead you must first get every ability to rank 1 then every ability to rank 2 and cetera. The reason is because of his active ultl effect)
ACTIVE (Devilish Form): Dialos automatically unlocks the active effect of his ultimate at level 6. For the next 2/3/4/5/6 seconds depending on the lowest cooldown among your other abilities Dialos gains all the active effects of his other abilities while replacing his abilities with new ones for the same duration.
After active ult: Q(Devil's Hand): Every second Dialos can activate q to extend one leeching hand (with a mouth) towards targeted enemy champion that damages overtime and heals for a percentage of the damage dealt. That hand stays attached for the same duration of the active effect of his q in the human form. If the ability targets the same enemy twice it will deal reduced damage and give reduced healing. W(Devil's WIngs): Every second Dialos can activate w to flap his wings and leap towards targeted direction. After that he gains 10% tenacity. This effect lasts for as long as the active effect of his w in human form would last. E(Devil's Mouths): Every second Dialos can activate e to extend mouths from his body on target enemy within melee range dealing damage and healing him for a percentage over the time the target rermains in melee range up to a maximum of the time the active effect of his e in hman form lasts.
The active effect will have a relative low cd since at early levels he won't be able to utilize his ulitmate for long.
Dialos is a super scaling champion. Weak at early levels but can sustain damage and escape. When you ult you have to be quick to decide and use your abilities properly. It will require you to multitask since he can both basic attack from a close and larger range simultaneously. Last but not least, he shines better at team fights where he can leech from multiple enemy champions while also hurting more one in close range. Flavor fact: At level 18 his abilites are 6/6/6 :).
!?!??!?!WHAT THE FAK IS ALL THAT???!?!?! Hey I know it probably seems very confusing and meaningless so feel free to ask me so I can clarify :) Moreover this post will be updated, and improved as soon as I can :).