The world is not always as civilized as people might think. There are still those who would follow the blackest paths of magic and become corrupted by the darker powers that flow through Runeterra. Shauna Vayne knows this fact well. As a young privileged girl in the heart of Demacia's elite, her father tried to convince her of the constabulary's ever-vigilant eye. Young and nave, she truly believed that her world was one of perfect safety, until one night, when a twisted witch took interest in her father. The malevolent woman overcame her father's conciliar guard, then tortured her family before murdering them. The young Shauna escaped only by hiding herself and then fleeing once the hag had departed, plagued by the screams of her loved ones as she ran. A burning hatred was born in her that day, one that could never be denied.

Vayne was able to take care of herself using her father's money, and she began to train as soon as an instructor would have her as a student. By the time she was a fully grown woman, she had become a grim warrior. However, the fields of battle were not to be her home. Demacia needed a protector, one who hunted those lost to the darkness. Shauna used her family's contacts to become the first Night Hunter, and now her prowess is the stuff of legends. It is said that those who practice the black arts quake when they hear that the Night Hunter is on the prowl. Despite her crusade, Shauna has looked at the League of Legends in horror. There are champions who have clearly lost themselves to the blackest of magics, and who have been embraced within the League even though they should be put down for the safety of all. The time has come for the Night Hunter to execute her secret mission to purge the League of Legends.

Not all shadows are to be feared. At least, if Vayne has her way.

INTENSE Range Carry ALL THE WAY...FTW

Passive:

Night Hunter
Vayne ruthlessly hunts evil-doers. She gains bonus Movement Speed when moving toward nearby enemy champions.

Tumble
Vayne tumbles, maneuvering to carefully place her next shot. She rolls toward the cursor and her next attack deals bonus damage.

Silver Bolts
Vayne tips her bolts with a rare metal, toxic to evil things. The third consecutive attack or ability against the same target deals a percentage of the target's maximum Health as bonus true damage. (Max damage vs. Monsters is capped)

Condemn
Vayne draws a heavy crossbow from her back, and fires a huge bolt at her target, dealing damage and knocking them back. If they collide with terrain, they are impaled, dealing bonus damage and stunning them.

Final Hour
Readying herself for an epic confrontation, Vayne gains increased Attack Damage, stealth during Tumble, and quadruple the bonus Movement Speed from Night Hunter.

Pros-

Range Carry
Tumble has quick cooldown
does ALOT of dmg if u go dps
SUPER fast, can chase any1 (even master YI)
good ganker/kiter(bait)
Stealth can be useful in initiating or running away
condemn makes tristana look bad

Cons-

Uber squishy so play smart
passive doesnt work while running away
Takes time to get used to
can get greedy if your going that fast
Tumble cant pass over walls

i get dps items because you can just stack your silver bullet and alrdy does alot of dmg plus if you get madreds it will do alot...trinity force is mainly for tumble...as for the last item it realy depends on you... for survivability you can get banshee's veil or guardians angel, more life steal/dmg bloodthirster life steal/more dps starks or if you want dps/mr get wits end. If your hungry for dmg though get armor pent items(yammus ghost blade for cd) or INIFINITY EDGE...thats it

so this is how it works, if your going 1vs1 be aggressive, vayne is one of the best 1vs1 champs... do not start a team fight let others do it for you...just wait and kill the dmg dealers, ganking however; you can initiate with your ult and tumble so you can have stealth and wont see you, when you have like phantom dance and trinity or something like that you can kite/bait them like crazy just dont over do it xD. When ganking try to use condemn first to stun them at wall or knock them back or if your running away, knock them back and tumble away, in early game DO NOT try to finish someone with Condemn unless you know your gonna kill them like a bar or below because its on 1, you wont get anywhere with that...

Farming:

about farming, just try to get as much minions as you can...last hit like crazy because this dps build is freakin ex*****ve and early game you want to rush your phantom dancer so you can chase and stuff in team fights...

Laning:

For laning always try to get mid lane or (solo lane for 3vs3)...like i said before vayne is BEAST 1vs1, dont take it though if you have a better carry or if its malzahar, because malzahar owns mid lane :), or dont go mid lane if you kno caitlyn is gonna be there because her range is scary and she can do alot more dmg to you before even reaching her with tumble...(if its 3vs3 try not to get sum1 who does alot of dmg like tryndamere or jax because its just bs in 3vs3)

Laning Partners:

If your going to lane at top or bot you should always get a partner who can do alot of dmg early game and initiate or some1 who can stun and do alot of dmg so you can catch up and tumble them...i dont really recommend a support or a squishy harrasser because you are alrdy a squishy harrasser and some supports are decent but i just dont like laning with them as much...(my opnion though, rather get a dmg dealer)

In summary, vayne is a pretty awesome range carry, i dont recommend this for alot of players who die alot or want survivability, this is for CHEAP bastards who want to kill ppl the piss off way...oh yea and ppl will target you alot so play smart xD