Hi.
Here is my Deck:
(Sideboard is missing, because i dont know what should i put in it. ).


// Lands
    2  Ancient Tomb
    1  Bayou
    4  Polluted Delta
    8  Swamp
    4  Underground Sea

// Creatures
    1  Ambassador Laquatus
    4  Worldgorger Dragon
    2  Xantid Swarm

// Spells
    2  Animate Dead
    4  Buried Alive
    3  Careful Study
    3  Compulsion
    2  Dance of the Dead
    4  Dark Ritual
    1  Demonic Tutor
    4  Duress
    1  Entomb
    3  Lim-Dul's Vault
    1  Mana Vault
    2  Necromancy
    1  Sol Ring
    2  Stifle
    1  Vampiric Tutor

I need some help with the deck, because sometimes it works, but sometimes it doesent. Maybe you can give me some tipps to make the win more constantly.
(PS: sry for my bad english, but im german and my english is not the best)