I was absently trying to make the Warcraft Paladin into a champion, and this is what I came up with

Passive: Aura of Devotion-Grants allied champs within 750 range 4-12% extra damage reduction. P2ssive: Holy Power-Hitting champs with your Q generates Holy Power, up to 5. Stacks fall off one at a time while out of combat with champions. Upon reaching 5 stacks of Holy Power, gain Crusade. Crusade lasts for 7 seconds after you no longer have 5 Holy Power. While Crusade is active, heal yourself and all nearby allies for a small amount of the damage you deal. Can only be gained once per 25 seconds.

Q: Templar's Verdict-Auto reset that deals magic damage. Bread-and-butter ability with a short cooldown. Generates Holy Power when used against champions.

W: Judgement-Judges (some) enemies within 500? range, prioritizing Champions. Judging an enemy causes them to take magic damage based on their current health, and afflicts them with Judged for a short time. Judged enemies take small bonus damage from all sources. Costs 1-2 Holy Power. (might be a slow as well)

E: Hammer of Justice-Stuns an enemy champion for a really long time and deals a small amount of physical damage with meme-level AD scaling. Costs 2 Holy Power.

R: Divine Storm-Swings a large weapon of Light around you in a 750? range circle, dealing lots of magic damage. Consumes all (at least 3) Holy Power.

I know that he's overloaded. Just made this for fun.