If you only want to play one color, that's a perfectly fine choice, but if there's an appealing card that you'd like to play in a second color, you can feel safe in doing so
Rad Ripples of Potential Mutational Advantage The Wise Mothman Mindcrank Mesmeric Orb as "Mothman Egg" The Wise Mothman returns
Finding Delney, Streetwise Lookout is usually a good idea, though
Building a deck with two Inks that complement each other well and which has a clear gameplan is one of the key elements of not just this, but most, trading card games
Meet the Crew Many Pirates can fill out this deck, and they reward aggressive gameplay in all kinds of creative ways
Kitchen Imp Kolaghan Skirmisher Lamentation Liliana, Waker of the Dead Lokhust Heavy Destroyer Manor Skeleton Mardu Shadowspear Mardu Strike Leader Markov Crusader Masterful Ninja Mire's Malice Mirri the Cursed Mogis's Marauder Nether Shadow Nether Traitor Night Clubber Nihilith Olivia's Bloodsworn Ormendahl, Profane Prince Over My Dead Bodies