After landing 3 basic attacks, Master Yi's next one within 4 seconds strikes twice, dealing 50% ADbonusphysical damage which applies on-hit effects and can critically strike. If Master Yi's primary target is killed before the second hit can go off, he automatically attacks another enemy within 300 range.
The fourth attack that triggers Double Strike will both reset the counter (even if it kills Master Yi's target) and add a stack for the next Double Strike activation.
The next Double Strikes will happen at every third basic attack because of this (at every second with Guinsoo's Rageblade).
Active: After a small delay, Master Yi becomes untargetable and bounces for up to 4 times on unique enemies that are up to 600 units away from each other, starting from the targeted enemy and prioritizing the closest ones, to then blink next to his primary target and dealing physical damage to all enemies that he touched. Non-champions receive increased damage. When Master Yi bounces from an unit it will grant vision around it. It will always grant vision around the primary target even if Master Yi doesn't bounces of it. This vision will not reveal bushes.
Alpha Strike's damage is calculated individually on each bounce. It is possible to inflict differing amounts of damage during an Alpha Strike chain if Yi loses Wuju Style's passive AD bonus in the middle of Alpha Strike.
Alpha Strike applies damage after Master Yi leaves untargetability and thus can attract turret aggro.