iMtG Server: Gathering

Blue Black Tempo 60 cards, 0 sideboard 4 {Temple of Deceit} 4 {Swamp} 3 {Mutavault} 2 {Island} 4 {Dimir Guildgate} 4 {Watery Grave} 21 lands 1 {Erebos, God of the Dead} 4 {Cloudfin Raptor} 4 {Pack Rat} 4 {Desecration Demon} 4 {Nightveil Specter} 17 creatures 2 {Inaction Injunction} 3 {Dissolve} 1 {Elixir of Immortality} 4 {Hero's Downfall} 4 {Thoughtseize} 4 {Underworld Connections} 2 {Syncopate} 2 {Devour Flesh} 22 other spells Sideboard Notes: Just an idea.

If you're going the tempo route you need to add more land. In tempo decks you need to hit lands every turn. This also looks a lot like a mono black devotion build