1v1 dueling and snowball potential.
Improved attacks and sustained damage
After a few seconds in combat, your first attack against a champion grants bonus AD and convert some of your damage to True Damage.
Takedowns restore health and grant bonus gold.
Takedowns on enemies grant permanent Attack Speed.
Deal 7% more damage to low health champions. Gain AD/AP after kills or assists.
Burst damage and target access
Gain a burst of Lethality and Magic Penetration after using a dash, leap, blink, teleport, or on leaving stealth.
Collect eyeballs for champion and ward takedowns. Gain permanent AD or AP, Adaptive for each eyeball plus bonus upon collection completion.
+9% Attack Speed
+6 AD or 10 AP
Conqueror on Master Yi empowers your ability to scale into mid-game teamfights and completely take over.
The heal from Triumph after a kill lets you reset and continue hunting down your next target.
Yi's favorite stat is Attack Speed so this is rune choice is a no-brainer.
Because Yi is an assassin, he wants to end his target's life as quickly as possible and Coup De Grace is the go-to for that.
Yi's [Q] grants him free Lethality upon arrival to provide more damage and end your target's life.
Eyeball Collection allows you to snowball early kills into your massive late-game scaling to take over and solo carry.