Random ideas for Champion Concepts, free from a very bored mind.
Was randomly thinking about League and champions when an interesting idea came to mind: What if everyone's Damage was reversed, and how could Riot even implement that? So then an idea of maybe a champion that 'Reverses' the damage dealt by champions came to mind. The idea of a champion being on the map causes a Veigar Ultimate to deal Physical damage, or a Riven ultimate wind slashing you for Magic damage sounds kinda interesting, but would it even be viable in a sense? You wouldn't need to build differently, or your scaling would be different, just your damage would apply like the opposite of what it normally is. Auto attacks would deal magic damage, Lich bane would deal physical damage but still scale off of AP, an ADC with Infinity edge and Stattik would deal Physical damage Crits with AD burst damage from Stattik. And so on and so forth.
an ADC could critically hit with magic damage. Just because a champion is on the map swapping everyone's "Damage Dealt." out. How about Corki dealing 80% AD damage and 20% Magic damage? The possibilities of such a thing are endless! And we're just talking about a single passive. Not even abilities or anything of the sort. But I Digress, having that kinda power by just selecting a champion seems kind of weird. Would you be willing to throw your tanks off by forcing them to build Magic resist versus a fed Vayne? Or maybe force a Galio to build Armor versus a Xerath? Its a weird concept nontheless, but it creates a sense of variety, just with a single concept. Swapping your output damage into the opposite category.
I had a few thoughts on a few other abilities the champion could have, like an ultimate that temporarily changes your "Bonus X" into the other stat. Fed Zed on the enemy team with 500+ AD? How about we turn that into 500 AP for a few moments? He won't be bursting your ally with that...
Anyways, just thought I'd let my thoughts out about this random concept. You do you Riot, we'll find our own ways to have fun anyways :P