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 naïve, 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.

Pros:
Short cooldowns on all skills.
High Damage output
Great Mobility
Impressive chasing
Versatile Ultimate

Cons:
Very squishy early and late game
Requires some skill 'Not for beginners of LoL'
Stun is conditional 'Can accidentally save an enemy'

Standard runes for my AD carries are Greater Mark of Alacrity, Greater Seal of Clarity, Greater Glyph of Focus, and Greater Quintessence of Desolation. The Marks (attack speed) allows for easier time stack your passive onto an enemy champion. The Seals (Mana Regen lvl 18) Allow for recovery of mana without wasting a slot for Tear of the Goddess. The Glyphs allow for even shorter cooldowns especially if you choose to go with Ionian Boots of Lucidity. And last the Quintessence (Armor Pen.) allows to blow through tanks at low lvls.

The Tree should be self explanatory to those who are experience with LoL.

Always have escape skills for Vayne. Flash and Ghost are ideal to have. You can substitute one for other spells, but always have at least one of them.

Possible Summoner spells are:
Ignite
Exhaust
Clairvoyance