Protective Tank Idea

So I'm a silver support main so maybe I have no idea what I'm talking about, but I'd like to see another tank that can work both as a mid and a support (like galio).

As I was thinking about it (mainly from a support perspective) I was thinking what is one of the main things immobile adcs need, like Varus or Cait, they need someone that can keep enemies away from them.

So here's what I came up with:

Passive -

• Hitting multiple enemies (minions or champions) with an ability generates a shield on this champion that stays until it is removed.

Q -

• Choose a direction and fling an object into the air, directly vertical, (creating some kind of force-field type wall below it. The wall will be thinner than most walls in the game now. I was thinking about the width of Neeko's root or Arhi's charm) the wall below it will absorb any enemy auto attacks or abilities that pass through it.
• After it reaches a certain height gravity will take its effect on it and the object will fall. Upon hitting the ground it will deal damage in a line (in the direction you picked when casting it), passing through anything it hits (excluding things like braum's wall and yasuo's wind wall), and the damage will be amplified by the amount of dmg it absorbed as it was traveling upwards.
• This ability will be their main source of damage and shouldn't have a long channel time. (I imagined it taking about half a second to complete casting). The player can move after the initial cast (once you press Q) and the ability will continue as normal.

W -

• Leap vertically spiraling upwards creating a whirlwind at your location that pushes away all enemies within a short range of the player (I'm imaging a radius a bit smaller than Viktor's gravity field). The push distance is also small, just so they're outside the radius of the whirlwind. Upon landing gain a shield that blocks X damage and decays over time (maybe send out a shockwave dealing damage).

E -

• Backstep (like Galio's E) and dash, leaving behind a clone. After X amount of time the clone returns to the player and pulls the enemy towards them NO STUNS OR ROOTS ARE APPLIED (maybe a slow). (similar to how pyke's/galio's dash works but this allows you to 1. dash toward an ally, closing the gap on an enemy when they're pulled 2. dash away from an ally keeping the enemy out of melee range)

R - (not sure about this one, I tried to be creative but it's hard to come up with something that doesn't already exist, would be fun to play against, and isn't overpowered)

• Choose one enemy, a percentage of that enemy's damage is dealt to you instead and your armor and magic defense are lowered for the duration. After X amount of time release a burst of energy healing all allied champions in range and damaging all enemy champions in range based on the damage taken.
• If the player dies while the effect is active only the heal goes off (since the player is taking increased damage they have a higher chance of dying so it's more likely the player's team will be outnumbered faster than the enemy team if they focus this champion. The heal activates to compensate for the increased chance of your allies having to fight an uneven battle) (I was thinking the heal would be a little less than Soraka's R which should be fine since this ability isn't global, and the damage I'm thinking would be around what Morgana's R does once the stun lands)

-Graven

P.S. Of course the damage scaling should be balanced so that this champion can both 1v1 and also, not have a huge poke potential like brand or lux.