Master Yi, who dont know that bastard, but, lot of people dont like him, why? It is weak in begining, and whit luck at mid or late game can become on unstopable killer machine. But, what happens if in begining we give him some "protection" ? ... Try this guide, and you will se.

Yi power is his Q, alpha strike - when it use, become "invincible", so, what than we need? a lot of Q, and some Hp in plus. Than thats why a good Master Yi needs couldown reduction (40%) and atack speed, to dodge all of enemys atack, and blow up theyr mind.