Mono Black Devotion

[A merchant of Asphodel]

Mono Black Devotion 75 cards, 15 sideboard 4 {Mutavault} 4 {Temple of Deceit} 12 {Swamp} 20 lands 4 {Gray Merchant of Asphodel} 2 {Rakdos, Lord of Riots} 4 {Rakdos Cackler} 2 {Agent of the Fates} 4 {Pack Rat} 4 {Desecration Demon} 4 {Nightveil Specter} 24 creatures 4 {Thoughtseize} 4 {Whip of Erebos} 2 {Doom Blade} 4 {Hero's Downfall} 2 {Ultimate Price} 16 other spells Sideboard 3 {Dark Betrayal} 3 {Staff of the Death Magus} 4 {Duress} 2 {Pharika's Cure} 3 {Cremate} 15 sideboard cards Notes: Very compatible.

[griffin131]

Wrong Temples. Unless you never want to actually cast Rakdos.

[SoshiGanrou]

You need a few more lands as well. You curve out at 5 and I recommend atleast 23 or 24 lands for that. If it works for you great but being able to not miss a land drop in this deck is important. And yes... The temples. {temple of malice} for the colors you are looking for. I would also recommend {rakdos's return} if you are wanting to splash red in here so you can help strip hands and a few other things