Champion Concept in the spirit of Halloween

Mid way through October and I still have not seen any news on the Halloween themed skins, so this got me thinking about champions and possible skins and I came up with a concept for a champion that was inspired by my favorite holly-day! I didn't decide on a class for him before I made him but after I was done he felt like and Assassin/Fighter that could go top, jungle and maybe even mid. Also I'm no expert in scaling and balancing of abilities so I made some rough estimates. Also I really like the concept of champions that use other forms of attacking like or so I included a bit of that into his kit! Last thing I will not include the cost of mana for abilities since honestly I just didn't how much to make them cost as well as scaling up or down when the ability is leveled up.

The lore of the champion would be that after the death of his family in an attack done by Noxus, ( I'm thinking about the attack on Ionia led by Riven and in the end bombed by singed, although I'm not sure if this confrontation happened in just a random battle field or near a town or in a town blah blah blah, so that I could link his lore to riven and singed and stuff cause lore.) two demons came to him in his final moments after being slowly killed by poison that offered him a way to take revenge on the people who made him suffer. The contract would make him immortal, while also being bound to the demons, until he could take down Noxus in exchange for eternal service in the afterlife. Anyways here is the champion concept.

Aidan, Power of the Underworld.

Passive: Mrybell and Behemoth Aidan is assisted by two demons storing up power as Aidan casts abilities. When 4/3/2 spells are used ( scales down when with levels 6/11/16 ) his next auto attack will be made by either Marybell or Behemoth based on who is currently assisting him using his w (which is a toggle ability; More on this later.) Also apply's on hit effects. Marybell: Ravages the soul of an enemy dealing 10% of their current health and healing Aidan for half the amount. Behemoth: Bites a target injecting a lingering poison that deals true damage after 4 seconds based on distance traveled. ( So this was a bit weird for me to put numbers on but since is 100 units I am basing distance off of him to make a better visual understanding of how this ability works) Also obviously will not deal damage if the enemy doesn't move. Deals 10/20/40 damage for every traveled. ( Scales with levels 6/11/16) This empowered auto does not deal the additional effects on top of Aidan's normal basic attack damage, instead, the damage comes from Behemoth or Marybell, meaning that if Aidan has 2.00 attack speed he will only theoretically attack once per two seconds that turn since one of the demons will do an auto for him.

Q: Be Afraid Aidan transforms targeted area around him into a part of the underworld for 1 second, if enemies are caught inside the area when the transformation ends they will be feared for 1.5 seconds and take 70/100/130/160/190 damage. 70% AP scaling. 16/15/14/13/12 second cool down.( Take not that Aidan is melee so in order for him to fear people he has to be near them for this ability to work on champions)

W: Command, Kill/Heal Passive: Aidan calls for help to his demons, depending on who is assisting him will give his auto attacks a special buff. Behemoth: Empowers Aidan to deal 10/15/20/25/30 additional extra true damage on his basic attacks. Marybell: Empowers Aidan to restore 5/10/15/20/25 hp on basic attacks. Has a fixed 3 second cool down to be able to toggle between Marybell and Behemoth. (Now yes this passive is on forever so maybe some numbers need to be changed to make it balanced)

E: To the Graves Aidan jumps to a location summoning corpses to claw in front of the direction he lands. If a champion is hit by this ability the cool down is reduced by 5 seconds. Deals 80/110/140/170/200 75% AD scaling. 20/19/18/17/16 second cool down. ( For visuals think of a jump but smaller with the cone being about the size of q )

R: Possession/Exorcism Aidan implants on of his demons inside an enemy champion applying grievous wounds for the duration of the possession. Deals 100/150/200 damage. 50% AD scaling. (The duration of the ult is 5 seconds.) During this time, Aidan can reactivate this ability to teleports to the affected champion stunning them for 1 second while Aidan extracts the demon from them. Deals 100/150/200 damage. 50% AD scaling. Aidan has to be within 1000 units to be able to teleport. ( The demon attached to the champion is chosen form whoever Aidan has toggled on with w. So for the duration Aidan cannot use the power of the demon used in the possession, duh.) 100/85/70 second cooldown.

Afterthoughts of this: So Aidan being melee has a range of 200, but when he gets an empowered auto from his passive the range from that auto is increased to 600. I was thinking his passive may be a bit too strong but since he really only has 3 abilities to use, one being his ult, and the other two not having a short cool down it can't be spammed. That and he lacks a bit of wave clear unless you want to use Q to wave clear but you are better off getting hydra.

I was thinking a good build path for him would be , , , or , then finish of with choice of tanky item and choice of boots. Not in that order necessarily.

Leave any feedback if you guys want!