Check out oldschool champ data with https://archive.org

Seriously, this is the coolest (and scariest) thing.

Go here, pick a nice URL from your favourite champion wiki/whatever source you want, pick a year, and enjoy what pops up.

http://web.archive.org/web/20110411182701/http://leagueoflegends.wikia.com/wiki/Master_Yi

Mastery Yi, 300 base damage with 100% AP scaling on his Q. Correct me if I'm wrong, but that also shows 700 + 165% AP scaling on his W. And kills refresh all his abilities.

Give it a try on something else stupid like release Xin Zhao.