A 6/6 for 6 mana is pretty standard, but it also gives you an immediate buff to one of your other creatures
In regards to building it, I want to give a shoutout to my friend Robert Stanley who helped me in playtesting as well as Stephen Dykman, who helped me figure out the best build despite not choosing to play the deck over the weekend
Losing access to green means you wouldnt get to play a beautiful foil Cartographer or any of the other green explorers, but if thats not a dealbreaker, Ive put a rough list together for this build over on Archidekt
Shadow in the Warp is an insane card, even outside of this deck
At 8 mana and with such heavy black requirements he is rarely cast instead preferring to be cheated into play but with cards like Dark Ritual and Lake of the Dead and 8 mana card is at its second most realistic for being cast in black
Overlord of the Boilerbilges (DSK) $11.31 The Overlord cycle is the new mythic cycle in Duskmourn , and each one comes with an impending ability, which is a little like a cross between suspend and the Theros god ability, as it can start as just an enchantment with an enters trigger attached