Nerf Master Yi
remember when sejuani got nerfed because cinderhulk made her broken?
Well, same thing is happening with Master Yi. If devourer was to be removed from the game, he would be fine. But alas, the item is in the shop, and I bet if you looked at the statistics for % of games master yi buys devourer, it is a large majority.
the double attack coupled with his own passive double attack leads to an insane number of hits with E active. Typically does 700 - 1200 TRUE damage in auto attacks while his E is active. Yes, you can invade, but even an unstacked devourer on this guy makes him hard to duel.
marks a target. A marked target will receive TRUE DAMAGE for 3 secs from all AA.