Hi guys this is my first build on Mobafire, I just wanna say that I am not a pro at this game, I am only gold. However I do have good ranked stats with this build.
Shàdòw - check lolking

Win Rate of 65% with 3.2 KDA

This build basically gets it damage from the talon Q, when it crits it does about 1200 damage at full build every 2-3 seconds and you got everything else to do

Pros:

Extremely Good at taking out enemies that are fed
High Burst post 6
High Mobility for early roaming
1 second silence is enough time to kill AP mid's before they can hourglass at level 18
Great escape with ult+ghost blade
Awesome Dance

Cons:

Can be killed with high CC (like any assassin)
Difficult to farm early
High Mana costs early
If you don't get kills early you wont scale well into late game

So with Talon there are several different ways you can go about a kill.

My preferred method is to W-->E-->Q-->R-->R
This combo, utilizes the passive mercy for which you do 10% more damage with you basics (including the Q damage). So you have 10% more Q damage

The only problem is that if the Q crits as well, you get carried away and waste your ult even though they are already dead ;(.

If you need to Stealth your way in:
R-->Ghostblade-->E-->Q-->W And then Ignite if you need
Basically even though people can see you have gone into your ult the bonus move speed + ghostblade + mobility boots and the range you have from the E to jump means that no one can get away> this is great for roaming bot or coming into lane and picking up an early kill after you have made your first or second B and your lane opponent is still farming.

Teamfight:
So this is where it gets difficult because you need to use your R for cover> With talon you want to let your team go in first and pick out your target, usually their ADC carry. As their ADC moves forward you want to Proc your Q and E-->W-->R and at this point they will be most likely be dead or forced out of the fight.
Now you will still be in your ult (invisible), so you can choose another target, their mid laner is likely to still be alive, so Run over with Ghostblade (while still in your ult) and position yourself to get the return damage of the ult and Q then W and Ignite if there not already dead.
At this point the Team fight is won most of the time and you can go for the tanks, you will be able to take them down solo because of the armor pen and life steal you have.

So when playing Talon it is all about the roaming. If you are lucky or they are stupid you can pick up early kills but it is unlikely.

Early Game:
Try to farm, remember you do have a lot of level 3 damage with ignite, so if they get below half don't be scared to go for the kill.
If you are playing against someone who is poking then hold back and farm with your W and ask the jungler for assistance. With the two of you, most mid laners wont stand a chance and you will burn flash or get FB.

Mid Game:
As soon as you get ghost blade and mobility boots, this is your time to get roaming, anticipation of the enemy jungler is important, the amount of kills I have got by predicting what their jungler is going to do is uncountable. The way to do this is to look at where they are heading and guess the camp. Junglers always pop and get wolves and wraiths when they are low - take advantage of it. With talon you can kill them before they flash.

Usually lanes will get pushed and you can sweep in and start raking in kills, HOWEVER, make sure you leave kills for other people on the team like the ADC and TOP laner. Because a talon with all the kills cannot win the game, the team needs damage too.

Late Game:
Focus on getting vision and picking off people - If you do this right the enemy team will get really far behind and will surrender A LOT, so you don't even need to team fight. If you do have to team fight make sure you tell the team who to focus and 9/10 times they will listen because you look like a God when you have loads of kills,and everyone listens to God.

If you want a team fight rundown, look at the skill sequence chapter - there I a full rundown of what you need to do there.

So basically follow the build, get the Core items and you can swap out black cleaver for other items if needed.

Roaming well takes practice, so don't go straight into ranked with talon, once you get quick with your combo you will notice that you get really fed really quickly in a lot of your ranked solo Q's.

Good luck!
This build was brought to you by a Shàdòw