Just some ideas :p

Passive: Each time an allied champion dies near (insert name) he/she gains a stack of (insert passive name). Each stack of (insert passive name) gives (insert name) 75 bonus health. (Insert name) can only have 10 stacks at one time and may choose to spend all ten stacks at the store to buy a soul eater. (soul eater is an item similar to )

Q: [mana cost 40/50/60/70/80] (insert name) places down a small pool of mana essence. Each ally champion standing in the pool (including him/herself) gains 30/40/50/60/70 mana over 4 seconds. Enemies standing in the circle lose half that amount over 2 seconds.

W: [mana cost 80] (insert name) creates a bubble around him/herself to shield allies from incoming projectiles. All projectile attacks that attempt to pass through the bubble are instead drawn directly to (insert name) and deal normal damage and crowd control effects still apply. If any of the crowd controls is a stun the bubble is instead popped and the enemy who fired the projectile is stunned for 1/1.5/2/2.5 seconds instead.

E: passive: Each of (insert name) basic attacks slows the enemy by 5% stacking up to three times. Active:[mana cost 35 all ranks] (insert name) places down a small devouring gateway. 2 seconds after placing the gateway it goes into stealth. The gateways stay in their spot and can collect up to 3 three (insert passive name) stacks which when collected automatically go to (insert name). If an enemy steps on the gateway they are snared for 1 second and take 35/60/95/130/165(+20% bonus health) as magic damage and consume the gateway. Each gateway lasts 5 minutes or until used or destroyed. (Can be revealed be trinkets or pink wards and give 10 gold for destroying)

R: When used on ally: (insert name) consumes all (insert passive name) stacks to heal an ally for 75/90/105 per stack.

When used on enemy: Only can be cast if (insert name) has a soul eater with him/her. (Insert name) takes control of the enemy champion. (Insert name) is killed instantly and the targeted enemy champion gains gold as if they assisted in the killing of (insert name). (Insert name) gets to use all of the enemy champion’s abilities and active items, at the time of possession the enemy champion’s health and mana/power is halved along with their attack damage and ability power for the duration. If the channel interrupted (insert name) is instead stunned along with the target enemy for 2 seconds.

This champion idea has been buzzing in my head for a while now and I figured why let a potential base for ideas go to waste right? (Or even a fully fledged champion!) Anyways I’m no developer or anything so really I have no clue how hard this would be to do or if it’s even possible but I’m really hoping you guys like my ideas and can find type of use for them in LOL, Enjoy! :D