1v1 dueling and snowball potential.
Improved attacks and sustained damage
Attacking a champion 3 times will expose them, dealing bonus damage and causing them to take more damage from all sources for 6 seconds.
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.
9% attack speed, 10 ability power or 6 attack damage
Gain a burst of Lethality and Magic Penetration after using a dash, leap, blink, teleport, or on leaving stealth.
Unique champion takedowns grant permanent out of combat MS.
Press the Attack on allows you to pump out massive amounts of damage to a single target and shed them with your high attack speed.
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.
Relentless Hunter on Master Yi allows you to quickly clear your jungle and get back to farming after a recall so that you're able to scale quickly into the mid-game with an item advantage.