[Champion concept] Dully - The possessed
Dully allowed a spirit(Shally) to posses her in order to fight an army who burnt her town down. Dully is a serious warrior while shally is comedic nihilist. Dully wanted to join League of legends because she wants to find the people responsible, Shally is just bored
Passive(Death's blessing): -Building ability power increases Dully's abilities range ,up to double the base range. -upon death Dully's ghost wanders back to the base, revealing a small area around it (Kind of like a walking ward but decreased vision radius)
Ability 1(back to back): Dully and shally combine forces and together launch two projectile in opposite directions: Forward(Dully)-deals extra physical damage of max hp Backward(Shally)- slows down enemies hit, root enemies who face the other way
Ability 2(Energy burst): Dully deals damage in an area around her. Increased damage in death wish.
Ability 3(Jump scare): Dully dashes/blinks to a target location dealing damage. casting fear to nearby enemies after being unseen, or while in death wish.
Ultimate(Death wish): Shally unleashes her full forces, gaining additional ability power, health, and increased on-hit damage and lowering cooldowns. kills/assists extend the duration after death wish is over dully is unable to use her abilities for a short period of time
Gameplay: Dully is a tanky mage who focuses on getting to the center of a teamfight and peel down the enemies for the carry. You would want to find a good unseen position to JumpScare from, then as the enemies flee in terror you use "back to back" to root a squishy target and using energy burst to prepare the dinner for your carry. Use Death wish when you are about to enter a disadvantage teamfight
Final thoughts: I tried to balance it a lot but It still might be op, shouldn't matter as it isn't in the game but I still had fun brainstorming it as if It would be so I left out any numbers.