Introduction
The New Champ is Great. However we all know he is probably going to get Nerf soon. In the meantime lets enjoy dominating nubs and making people check their panties every time you activate your Ult!!! This champ is great for an aggressive player who likes to harass a lot. With some practice and the right combination of spells you can 1v1 almost anybody.
Update 4.11.11 - Remove Trinity Force, Changed Seal Runes, Added a more detailed end game
item sequence and gameplay
Pros / Cons
Pros:
-Great Melee Damage
-Great Chaser
-Easy to get around the map
-Great 1v1
Cons:
-Not very good as a team player
-People target you a lot
-Very Mana dependent
Early Game



I start with Doran's Shield to get some survivability early game. Depending on how the game goes i tried to stay out long enough so get Berseker's Greaves. After that i save enough to go back and get Zeal, this is a very important item for you in order to increase your Attack Speed, Critical Chance and a little bit of Movement Speed. After this it all depends on the situation of the game, if you are getting fed you can save up and either finish Phantom Dancer or get a B.F Sword. In the other hand if you are having a hard time then get Vampiric Scepter. The life steal of Vampiric Scepter combined with your passive will allow you to stay in lane longer, work on your farming and try to get some kills or assists.
Mid Game



Next item you want to focus on is your Infinite Edge, this item is a great boost, its going to add a great deal of Dmg, plus increases your Critical Chance but the most important thing is its passive, giving you that extra 50% Critical Damage it is definitely a difference. Next item in your list is going to be the Black Cleaver, increase your Damage and reducing their armor is going to leave most squishy champs wide open for you to Crit them to death in a few seconds. Finish your Bloodthirster and your are dealing some serious damage at this point.
Late Game


I like to go for Banshee's Veil, the spell protection of Banshee's plus your Shroud of Darkness will allow you to take someone out almost without taking any damage. Getting your Banshee is very important, you can ult someone let them use a spell on you which is going to remove the aura, immediately activate your Shroud of Darkness to block yet another spell at this point most champs are dead or soon to be, if you land your combo right fear will affect your opponent by this moment giving you a few seconds of Damage free time to kill someone. Remember that every game is a little different based on the team composition on the opposite team. In some cases there is a champion that is dealing the same amount of stupid damage as you and its killing you as soon as you show anywhere near the team fight i.e Xin Zhao or WW. So instead of getting Banshee's Veil you will get Thornmail and just enjoy watching them kill themselves while you cut them into little pieces.
Gameplay
When you ult onto someone, the first thing they are going to try to do is to get away, either by Flash or Ghost. If they use Flash well depending on the circumstances you may be able to catch up with them using your DuskBringer. If they don't have Flash or Ghost they are going to use some kind of spell to Slow/Snare/Blind you, which is going to be nulled by Banshee after that you activate your Shroud of Darkness and block whatever else they have, at this point they are just trying to run away or going down with honor and trying to do as much damage to you as they can before their doom. Using your ult can save you or someone else even if you don't use the dash, once you activate your ult most people try to back out because it is creepy and they can't see much but it is also going to disrupt their team play, which is going to allow you or a teammate to scape or in the other hand ensure a successful gank. IT IS VERY IMPORTANT FOR YOU TO ACTIVATE SHROUD OF DARKNESS PRIOR TO ULT INTO SOME ONE IF YOU DONT HAVE THE AURA OF BANSHEE'S VEIL UP you do not want to ult into someone and find your self stunned and getting kill.
Summary
Overall a great champ. I will be adding more info later on. Any suggestions are always welcome!!