Master Yi Build
Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
So, here it is. 500ish move speed, fast even without highlander, 2.0 attack rate, more then 100% critical chance, so you actually crit every hit, 2 times per second... thats some major damage. Hex is for dmg, life steal so that other yi, or WW doesn't stand a chance against you. Infinity infinity... Critical chance and dmg are just to sweet to resist.
With all this, you get around 286 damage at 18, 2.0 attack rate, 500ish movement, which equals death sowing machine. Ashe goes down in 5 hits, tanks go down in 10-15.. that may sound a lot but you have to remember, 1 hit is 0.5 seconds :P so 10 hits is actually 5 seconds or less...