Champion Idea: Clink, The Welder
So we have 2 robots in league, and I think we need some more. This time we can fit the bill with an ADC. The design I was looking at was the Guardians from Legend of Zelda, Breath of the Wild. Like a walking turret.
Passive: A Well-Oiled Machine - Clink's attack speed is permanently reduced by 20% at all times. Every 3 basic attacks he doubles his attack speed for 5 seconds (10 second cd).
Q: Bonding Agent - Clink's next basic attack welds his target to the closest enemy or wall, snaring both of them for .5 seconds. = 10 second CD. Upgrades up the snare duration to 1.5 seconds. CD stays the same.
W: Metallurgy - Cover yourself in a damage absorbing shield for 40/60/80/100/120 damage (+50% your bonus health) for 4 seconds, after the time is up or the shield is destroyed take 5% more damage for 2 seconds.
E: Safety Issues - Passive - Every time Clink uses a spell or attacks he gains a stack of Arc Flash. After 10 stacks he blinds every enemy attacking him for 1/1.5/2/2.5/3 seconds automatically.
R: Arc - Channel a beam of energy that deals 10/20/30/40/50 (+100% your bonus AD) damage per second to a target. Reactivate to change targets. Lasts for 15 seconds
The idea was basically an ADC that's a little bit like Urgot but with an ultimate that deals damage. Which is what I feel like he lacks. So like, his abilities are like Bard's Q, Urgot E, Teemo Q, and Vel' Koz R with some tuning, but all of it worked with the aesthetic of a welder.