The Gem Knight

Here is a champion that is built from mainly old or scrapped abilities. I really liked the concept of Tarics before the rework, both the concept of the Gem Knight and his Shatter. The Gem Knight Concept is something I really liked and would love to see brought back. A fully armored knight with a shield (maybe a kite shield even) and mace(or other non sword weapon.) I liked that with Shatter you had the choice, should I be tanky or should I make the enemy easier to kill. If you bring that ability back it doesn't have to be passively gain resistance and reduce the enemies resistances. It could be passive shield or something defensively and something other like CC.

This is how I would imagine the Gem Knights Kit.

Passive: something fitting for a melee tank/semi support.

Q Vorpal Blade, something single target or heal, Vorpal Blade is both

W Shatter

E some mobility ability or hard CC. Righteous Gust could also work.

R Hyper-Kinetic Position Reverser, I think it would work well.

Cast E then R, then u finally switch you can cast W and Q the enemy you ulted.

Abilities inspired by.

Techmaturgical Repair Bots: P Heimedinger grants nearby allied champions and his  turrets 10 / 15 / 20 / 25 / 30 health regeneration, persisting for 5 seconds after they move out of range or his death.

Heavenly Wave: Q Active: Karma sends forth a wave of hidden blades from her fans, dealing magic damage to all enemies in a cone in front of her. Mantra: Heavenly Wave also heals Karma and her allies in the cone.

Imbue: Q Active: Taric heals the target ally, healing himself for the same amount Taric heals by an additional 40% when targeting himself

Shatter: W Aura: Taric and nearby allied champions gain 12% of his armor as bonus armor. Passive: Taric gains bonus armor while Shatter is off cooldown. Active: Taric shatters his gemstones, dealing magic damage to all nearby enemies as well as reducing their armor for 4 seconds

Vorpal Blade: Q Active: Shen throws a blade at the target enemy, dealing them magic damage and marking them for 5 seconds. Shen and allied champions are healed over 3 seconds upon damaging a marked enemy, with the duration refreshing with subsequent damage. If Vorpal Blade kills its target, Shen instantly benefits from a second's worth of healing.

Righteous Gust: E Active: Galio unleashes a gust of wind in the target direction, dealing magic damage to enemies hit and leaving behind a directional draft for 5 seconds. Allies who step on the draft gain bonus movement speed if they travel in the target direction.

Hyper-Kinetic Position Reverser: R Active: Urgot grants himself damage reduction for 5 seconds and channels for 1 second, suppressing the target enemy champion for the duration. Upon completing the channel, Urgot and his target blink to each other's locations, allowing Urgot to ignore unit collision for 1 second, slowing the target by 40% for 3 seconds and causing nearby enemies to flee for 1.5 seconds excluding his target.