Ghost champion

Name(you can pick one) unless you want spellas that's a pretty cool name

Lore Well a ghost so probably died at some point, I'm not getting paid so I mean you guys need something to do.

Passive: Shows when any unit dies within x distance(generally large area but not overbearing so will see some jungle deaths from lane but not all) and on each death within distance gains a soul(or ghost buddy if you prefer to call it!) and gains twice for large minions and champions and gain x amount move speed per soul.(not too much)

Q: Deals slight magic damage and slows for x seconds

W: Drains all souls(or ghost buddies!) to deal x amount of damage per soul (high damage, main damage output but loses all/most of mobility if use

E: Passive: basic attacks and spells deal bonus magic damage to enemy units/champions that has killed an ally champion within x amount of seconds

Active: creates a portal that remains open for x amount of seconds and any enemies that are inside of it after it expires are damaged, drawn to the center of it and blinded for x seconds, can be activated to close early but will deal reduced damage and won't blind

R: Possess Can only be cast when dead, haunts the killer granting vision, slowing movement and slight damage per second. If the champion dies while being possessed you come back to life. Can also alternatively be cast on a newly dead ally to switch places with them and die in their place/resurrecting them by killing yourself.

Something along the lines if that though I made it fairly terrible and unprofessional you get the main point of it, support type character that can kill if adc or anyone for that matter dies near them and has a big burst attack that can hurt but make you not be able to escape etc.