talon is burst dmg that can kill almost anyone in a few hit
this is not a complete guide but only tips for you to play talon

and id like to tell you that english is not my first language and this is my first guide

Pros
Fun to play
good for chasing
lots of burst
ultimate have lots of use
Cons
squishy
dont do a lot of dmg with basic attack

My two summoner spells are ghost and ignite ghost is for the extra speed when chasing enemy and escaping quickly with your ult.
Ignite is for the extra dmg you will need to finish the enemy in your lane and since talon is very item dependant this is a must.
You might also consider flash so you can teleport to your target and flash away after using your ult.
I foud another way to use flash that could be very useful in team fight you start your ultimate as usual on the the target closer to your team then you tele at the end of their team that way all of the blade will hit their team for maximum dmg

My masteries are pretty straight foward for maximum dmg you could try a more tanky way but i prefer this one since my runes are already defensive

well armor pen for your demacian diplomacy to hit harder and some defensives runes to help your early lanning so you can sustain more dmg

I created this guide knowing only my what my items were
I tried this many time and its one of the best combination and here why
Youmu ghostblade is one of my first item crit dmg dmg and most importanly CDR because talon's ability are a bit too high since hes not doing a lot of dmg with is basic attack CDR is also usefull for his ult witch is is only way of escaping
Trinity is the best item for talon sheen give him the extra dmg he needs for his demacian justice and the mallet gives him the slow that he need for his passive to work and zeal give movement speed

at the beggining of the game you try to play safe until your lvl 3 and you can tele use your backstab and slow him down with your shuriken a bit like jax jump and since your tele silence it work especialy well on mage later in the game try to gank using first your ult in a bush tele on an enemy and backstab doing so will put all the blade that you had summoned in te bush on the target for the extra dmg

your main damage output is Noxian diplomacy so you will whant to max this one first the two other will help to type of play first if you like to gank and focus hero cutthroat is better for the 15% more dmg and the silence to help you land Noxian diplomacy on the other hands if you prefer to farm some minions in your lane shadow assault could be a better choice since you can clear waves of minion more quickly but its up to what you like to play

in team fight what you will whant to do is tele backstab in the enemy team escape with your ult then look at low life and tle backstab on them

Talons unique skill is his ult this ability can be pretty devastator or pretty lame depend on how you use it example If your 1v1 you can just use your ult and backstab rigth away this way you will maximize the blade impact and be sure if your using your ult for gank dont hit your target from the from because none of the blade will hit your target.
The only other spell that could be call unique is the shuriken because they are hitting your target twice.

my build is not really based on farming its more on harrassing the enemy lane with your backstab
and ganking other lanes of course you can farm if you whant to play more safely but in that case you will whant to max your shuriken first instead of your teleport but always max backstab first since its your main damage source.Shuriken can clear lane very fast if you max it first but your ganking and killing ability maybe will sufer from it because your teleport cooldown will be way to long.

since Talon is have no way to heal himself I really dont recommend jungling but on the other hand hes a really good ganker if you can find a way to lvl yourself to lvl 6 quickly and start ganking with your ult it could be good but my build is not recommended for jungling maybe you will whant to look somewhere else for a real jungling build

Well of course your best target are gonna Mage Why its really simple because you can get close to them really quick and you silence them when you do your teleport.The easiest mage to fight are gona be those who rely on skill shot example Morgana, Lux, Brand because all those skill shot have high cooldown and are critical for them to land example brand stun lux snare the idea behind that is to teleport on them the second their skill shot is going to hit you doing so will get you close silence them and they waste a spell that do dmg but also help them get away from you then you just have to land backstab and shuriken and its done your target is dead (may need some more chasing and auto attack)

Since talon focus on doing a lot of damage quickly tank are gonna be your enemy of course you can still deal some dmg but in 1v1 situation you cant just auto attack them and pray the god.
You might consider a little chase in the bush so you can utilise your cooldown twice or even more note that with the cd reduction item your Q(Backstab) will be approximately 3.5 sec at lvl 18 but since you dont whant to attack them directly you might whant to let all the bleeding effect to finish before landing another strike.