What is the quickest way to see opponent champion ability info in pregame

You randomly run into those games where you run into a lane opponent that is a niche pick that you can't quite remember all of that opponents ability dmg types or effects or may have been influenced by patches. My question is, when you run into that rare opponent, where do you go to get a brief summary to this information? I mean things like base dmgs and ratios, cc effects/durations, etc?