Nevermore Guide and Item Build

Play Style
Always try to choose the middle lane no matter what unless there's a better laner then you, sf needs all the creeps and denies without them his just shitting in the toilet !
From level 1-3, try to last hit and deny as much as possible! Untill you get your bottle then it's time to get some fast farming and kills. If you feel that you are lacking some kills, go to the level 1 camp and if you are lucky, you might have the kobold camp, one raze and you will have 10 souls.

Early Game ( Level 1-11 )
During early game just last hit and deny. If you are having trouble last hitting, try to deny as much as possible as they give you souls as well. Once you hit level 3 ( Raze level 2 ) start razing the creep when they are somewhat in the red health.
Press (x) and try to last hit the other creeps. as you can see from this screenshot, the lowest health creep, using a (x) will gurantee a creepkill, and if you last hit properly, you might have all 3 creeps!

Runewhorring
Runewhorring is very important to shadow fiend, giving him the ability to refill his bottle and various runes that could help you in a sucessful gank !

Various tips when taking a rune.
Before the start of the game,  as seen in the picture, by standing there you will be able to see the runes.
Try to take the runes when the timer is like 1.40, or 3.40, 5.40, etc etc. Taking runes at that time would allow you to ''stack'' runes. Do not spam the bottle immediately if you get hit or just by using one raze, bottle are not like tango.
Some useful runes,
Illusion: not really useful but good as a decoy, hiding in the forest and sending it first from the front, and then come out from the back
Invisibility: Perhaps the most useful rune early game for ganking, go behind him and give him a taste of Sf Triple raze, and kiss goodbye to him (:
Haste: Almost the same as invisible rune, but more risky. Most of the time will have a kill with this rune.
Double Damage: Not so useful rune for ganking, but useful for last hitting, and harassing your enemy !
Regeneration: Nothing much to say about this right? one more advice, when your regen rune is taking effect, try to spam razes, even if they dun hit, having more regen is better then less regen !

Midgame (Level 11 - 16)
Shadowraze still hurts like hell, even though is it midgame, and it is midgame where shadowfiend completely owns almost everyhero, due to a good early game farming. Midgame is also a very important part of the game for our shadowfiend ! If shadowfiend loses midgame, your lategame might not have lots of hope. Unless you manage to kill them off and rax them !
Mid game is also a part of the game where you will have your dagger/lothar's edge, and ganking will be alot much easier !

Killing people with Requiem of Souls(kelen's dagger) tips:
If you have max souls find someone with 900 hp in a lane farming, or in the jungle! Dun try to engage him near the tower, and once in range blink + requiem of souls, most people would take about a sec to react to this, and your requiem of souls take 1 second too, if your lucky he might get 1 hit ko, or he is in his red health, just finish him with your shadowraze(z) or normal attacks. If he doesnt die, due to his imba amount of hp, chase him, but if he is near the tower, just retreat.

Killing people with Requiem of Souls(lothar's edge) tips:
If you have max souls find someone with hp around 1100 or lesser in a lane farming, or in the jungle! Dun try to engage him near the tower or if he is retreating. Once you have prepared, immediately use lothar's edge and run to him. Remember STAND(overlap) into him, as this deals the highest possible amount of damage. He would probably die to one Requiem of souls, raze him if needed. If he doesnt die, due to his imba amount of hp, chase him, but if he is near the tower, just retreat.

If you have nothing to do, try to do something, either kill or farm, dun idle or afk, as this could be a great problem for shadowfiend. If there are no creeps, go and whack a neutral. Just continue to farm till lategame, where the real DPS output of shadowfiend come. If you think you could rax or end them early do so, because there are other hard carries that could kill shadowfiend !

Lategame(Level 16-25)
You would probably have 5 kills and above by now, having outfarm lategamer and most players in the game. It's about time to end your enemy. Your item slot should have Manta Style, Bkb, Stygian Desolator(or other orb effects), Boots of travels, magicwand and perhaps a bottle. With items like this, your damage output should be at 150 ++. With stygian + presence of the dark lord, your damage would hurt like hell ! End the game as quick as possible, if the time exceeds 60 mins, shadowfiend power will decrease to superlategamers ! But if your still farming, shadowfiend will win them still.