Only a few words about some tactical stuff. In this deck there are some key cards:
1. N'Zoth, the Corruptor - also known as "We must build that wall". You can play it after at least two or more of your Sludge Belcher & Deathlord. Best play: Play N'Zoth, the Corruptor and take it directly back to your hand with Shadowstep. Next turn you play N'Zoth, the Corruptor for 8 mana and directly copy it into your deck with Gang Up. The first wall will not be that great but consider that all the triggers from the previous walls count for the next... This combo is important in games against aggro and midrange as well as a few control decks.
2. Coldlight Oracle - also known as "Everyone, get cards here!" The first murloc can be played in the early game to draw some cards. (It's actually bad against aggro decks.) The second should be copied with Gang Up. Play as many murlocs as possible in combination with Brann Bronzebeard and sometimes with Shadowstep to finish the game. You will kill many control decks with this combo.
BTW: Against jade druid you need to play both Gang Up on N'Zoth, the Corruptor since you cannot kill them with overdrawing.
3. Shadowstep - also known as "here I come and here I go". This card is super strong and very important in this deck. Since it makes your cards 2 mana cheaper you can use it as a safe way to multiply your N'Zoth, the Corruptor (see point above). And of course you can draw a lot of cards and let your opponent overdraw and die with Coldlight Oracle. Further you can use it to have more heal with Antique Healbot or to have multiple removal with Vilespine Slayer. Just try to get as much value as possible out of it and don't be too greedy with this card.
4. Reno Jackson - "Wait what? Reno in a deck where most of the cards are played twice??" As wrong as it seems, it can actually be a game winning card in this deck! The trigger will take place in the late game when you come to the point of overdrawing! Here you can play the best healing card before you kill your opponent with overdrawing. Try it out and you will be surprised how powerful Reno Jackson can be in this deck! But consider that quite often you have to play reno before you play your second Gang Up to get the trigger! (Here a deck tracking program will help you a lot!)
And yes I know, it's far away from a t1 deck. Against most aggro decks like pirate warrior there is almost no chance to win. But at the same time the win rates against control decks are insane. And at the moment there are a lot of decks which are easy to defeat such as OTK priest (actually all priest decks including dragonpriest), control shaman, all mage decks and renolock. And yes, often the deck is just super funny to play! :D
All the other cards are manly to keep you alive while drawing through the deck and building up the wall.
Make Trump happy with your wall and enjoy the deck!
(Sorry for the bad English)