Support champion concept and ideas

I saw this video and decided to come up with my own ideas for a very unique champion. You and the ADC (for example) become a single person.the health and def stats sum up to your adc´s stats. passive increased mana regen(increased HP regen if resourceless) , Q bond you become the same person with another teammate buffing him , W poison (gromp passive) the attacker gets poisoned for attacking you scales with AP and/or health and cant be deactivated and costs no mana , E either a heal or a shield and ult AOE teamfight buff increased AP AD and HP by X%. you can still roam around to ward or recall but you have to me attached to someone for max efficiency. its like an adc with the stats of a tank but solo in a 2 person lane. works either with mana or is resourceless. Lore: it was supposed to be a battle enhancing drug but ended up being a living creature , with the same enhancing effects. +Counters Assassins +Works excellent with a good teammate +Teamfight AOE buff +Not forced to stick with one person only you can still roam -hard to balance -Teammate might be trying a new champion and messing up(it will get frustrating for you as well) -frustrating to play against