Was just going to say, after reading his comment I immediately thought of the dreaded League of Cleaver, first preseason patch of Season 3, just after Metagolem got its first nerfs. Damn, boots + 5 cleaver Talon and Zed. . . I still have quiescent cancer cells from those dark days floating around in me somewhere, I'm sure.
EDIT: Also want to point out, not only did Corki stack BC in under a second with his E, his E was also used to shred armor as well, so with armor pen runes (which were VERY common that patch) he could be hitting for close to true damage on most characters.
Secondly, if you could auto attack or had AD ratios, you built cleaver. Even in other game modes, you built cleaver. I fucking saw 5 cleaver KARTHUS. The character who for the longest time, had one of the worst AAs ever, and who had an ability designed with the intention of replacing his auto attacks, who also has nothing to do with anything related to physical damage in his kit? But wait, someone realized that his wall was reducing up to 40 armor and magic resist. This might seem kinda random, but it actually made AD Karthus OP on this patch for the sole reason that it was the largest source of armor reduction in the game, and for those of you who might not know why that's important, reductions can go below zero, and everyone was already getting their armor shredded and then penetrated into oblivion, so Karthus effectively made squishes -40 armor if he could wall them.