Regional Mechanics

So while looking at things (mainly Riot's love of Ionia but that's besides the point) about champions in league I had a thought, as we all know energy is a unique mechanic that only Ionian champions can have, so I wondered to myself, what other mechanics are unique to certain groups of champions based on region?

To be honest I only could come up with three other instances of region-unique mechanics, and two of them aren't even fully unique. So, let's go over what I could come up with, if there's anything I missed please tell me

• Gold Generation Champions: Gangplank, Pyke, Twisted Fate, Draven Region: Bilgewater, with the exception of Draven, who's noxian

• Evolution Champions: Kai'Sa, Kha'Zix, Viktor Region: The Void, with the exception of Viktor, who's piltovan

• Percent Health True Damage Champions: Fiora, Garen, Vayne Region: Demacia

I don't know why I did this but I'd like to hear your thoughts