Hello, I recently figured out a REALLY op build and I'm here to share it with you guys. Ultra Crit Yi is for a troll I don't recommend using for ranked but you can.

Take Precision and then Conqueror for the true damage (It will doo enormous damage late game with ur e) and then Trumiph for the heal when escaping tower after killing enemy this rune could help u a lot.LEGEND: ALACRITY for the attack speed. It will help U a lot for the extra attack speed. U could go something else if you want to.Coup de Grace Increases ur damage for low health champs like tanks. It will help u take down tanks. For ur secondary take domination and then Sudden Impact. After u use ur alpha this will do MASSIVE DAMAGE. For the last rune take Relentless Hunter for the MS. It will help u A LOT. Especially if u sell ur boots.

I justed wanted to explain about the optional builds. For the one with Red smite but no boots you have 2 choices. Rageblade and Essence Rever. Get Rageblade for getting objectives (EX. Baron, towers, Drake, and E.T.C.) Get Essence Rever for the extra CDR. Helpful when ur getting kills not objectives. I don't recommend selling Da saber cause of the Red smite. Gives u insane amounts of dmg.

So I will give u guys reading a Step by Step guide on how to use Yi's abilities.

Q Alpha Strike
For ur Q its used to these following things: dodging, gap closing, and wave clear. When ur diving under turret it's a very useful ability. You could dodge a turret hit with ur blink and (Hopefully) secure the kill and get out alive.

W Meditate
Another ability use under turret. When a turret shot is coming at u when ur trying to escape the range of the turret, u could press W and live the turret shot easily. Also using W will let ur ult be on longer a little longer. It also gives u an Instant Passive stacked (Double strick) Good for securing kills early game.

E Wuju style
This ability will give u insane amounts of dmg late game. It gives u true dmg with ur conqueror!!! Dats op. And if u red smite them dats even more Op.

R Highlander
Yi is almost useless in team fights without ur ult. (but with his build he's not!) Its good for chasing down people and with the extra Attack speed and MS.

In the beginning, I go Red buff. After you killed go in this order: Kill Blue Buff, Kill wolf, Kill Scuttler, Gank (If possible) Recall. Then Raptors Scuttler (If not killed) then toad then gank. You have to get as much gold as you can. Gank you lanes enough so that you fulfill your duty as JG. Go for dragon when your level 5 or 6. Unless it's a late game that goes on for 4o~35 min, YOU HAVE TO BUSY. Gets some kills for gold. Don't do team fights until u get ult. Yi is useless in team fights without ult. Get ur saber and rush Zeal. 15% crit doesn't seem a lot, but its a lot of help then u think.

If you did it right you should at least have the Infinity Edge. Get Herald if it's still there. Push a bunch of lanes and go for some kills. Even before you get the full build you should be pretty op. Get more Dragons and still get Red and Blue on a Regular basis. Once you get the Shiv and the Greaves Its gonna be INSANE amounts of damage.U are now very useful in team fights cause u do insane amounts of damage.

Now in the late game, you should have finished your build. You could solo the Elder Drake also Baron (Very easily if u have mountain drake and Rageblade). Who cares if you lose or win you get a BUNCH OF KILLS. Now U could get easy pentas, Tower Dive, Kill adcs like nothing.

Well, it was nicing sharing my build and Peace out!