So you must be thinking, WHAT THE HELL IS A TROLL YI?!
Simple! It started out as a Youtube sensation known as Dunkmaster Yi, it was mainly Master Yi going as fast as he can and dealing tons of damage. Though it did tickle my funny bone, it wasn't enough. So I made a little build that did satisfy my craving for doing crazy stuff whenever me and my friends would play with each other. Hopefully it'll satisfy your too ;)

For summoner spells, it's pretty basic.
Revive gives you (IMO) the fastest speed boosts in game, while Ghost gives you some more speed.
Mix that up with Yi's Highlander and his Homegaurd and you'll be running around Summoner's Rift like Doran the Explorer
(Side Note: Changed her name for copyright purposes)

For Runes and Masteries its all about gold income movement speed, attack speed, and cooldown reduction.

Let's face it, runes are sometimes a bit of an annoyance, sure they're great help but spending that much on runes when you can spend it on champions instead, seems like an easy choice to make, but let's skip my mutual dislike for runes and get to it.

I can sum all those listed runes and masteries in four simple reasons.
- Gold Income: Either you're underfed or that freakin' ranged cary is always still your minions and kills, gold income is a great help to but big items.
- Attack Speed: Along with movement speed, attack speed is also a key stat to the Troll Yi build. The pure thrill of running around the map swatting whoever you see with your sword at lightning speed is such fun.
- Cooldown Reduction: Sadly Revive, being the summoner spell that gives the largest movement speed buff also has the longest cooldown of all summoner spells, but don't let that hinder your trolling tactics. A quick combination of Highlander, Homegaurd and Ghost is sure to perk that right up, and with cooldown reduction, it makes it that much more of a walk (or run) in the park.
- Movement Speed:...... Yeah.. That pretty much explains itself

So that's pretty much it for the Troll Yi build. I would love to hear any and all of your comments, this is my first guide after all and I know I still have ALOT to learn.
So again, that's it and have fun trolling! XD