I just want show you my build. If many of you will like it i will write guide. :)
for last item you can pick atma phantom guardian or frozen mallet ;) i pick phantom to get 100% crit chance.
Anyway i need to write somethink if i want show you this build, thats why i will add talon history :). Plz comment if you like my build or if you have better idea to build him, Also send me your builds i will comment ;). I hope you like it and comment plz.

Regards

Talon's earliest memories are the darkness of Noxus' underground passages and the reassuring steel of a blade. He remembers no family, warmth, or kindness. Instead, the clink of stolen gold and the security of a wall at his back are all the kinship he has ever craved. Kept alive only by his quick wits and deft thievery, Talon scraped out a living in the seedy underbelly of Noxus. His mastery of the blade quickly marked him as a threat, and Noxian guilds sent assassins to him with a demand: join their ranks or be killed. He left the bodies of his pursuers dumped in Noxus' moat as his response.

The assassination attempts grew increasingly dangerous until one assailant met Talon blade-for-blade in a match of strength. To his surprise, Talon was disarmed and facing down his executioner's sword when the assassin revealed himself to be General Du Couteau. The General offered Talon the choice between death at his hand, or life as an agent of the Noxian High Command. Talon chose life, on the condition that his service was to Du Couteau alone, for the only type of orders he could respect were from one he could not defeat. Talon remained in the shadows, carrying out secret missions on Du Couteau's orders that took him from the frigid lands of Freljord to the inner sanctums of Bandle City. When the general vanished, Talon considered reclaiming his freedom, but he had gained immense respect for Du Couteau after years in his service. He became obsessed with tracking down the general's whereabouts. Talon's suspicions led him to the doors of the Institute of War, where he joined the League of Legends in order to find those responsible for Du Couteau's disappearance.

''The three deadliest blademasters in all of Valoran are bound to the house of Du Couteau: my father, myself, and Talon. Challenge us, if you dare.'' - Katarina Du Couteau

Mercy
Talon's auto-attacks deal additional damage to a target that is under the influence of any crowd control effect.

Noxian Diplomacy
Talon viciously stabs his enemy, dealing heavy physical damage and causing them to leave a blood trail that Talon can use to track them.

Rake
Talon fans out three blades in front of him that quickly return to him, dealing damage and slowing any target hit in either direction.

Cutthroat
Talon leaps behind his target and silences them for a short duration, amplifying the damage of any of his follow up attacks and abilities.

Shadow Assault
Talon enters stealth for a short duration, gaining a movement speed boost and sending blades that deal damage to all enemies in their path flying in every direction. Once the blades reach a certain distance, they pause and form a circle. When Talon reappears from stealth, the blades return to him, once again dealing damage to any opponent they pass through.