I'm trying to develop a casual deck that's centered around controlling exactly one creature at a time and making it powerful via
Homicidal Seclusion and
Deadly Wanderings (and maybe
Demonic Rising). However, I'm drawing a blank of creatures that'd be good for the deck. The only one I've found so far is
Skittering Horror.
Would it be reasonable to splash other colors for the deck, or better to stay mono black?
In either situation, what are some creatures that are good at running solo?