Is Grma, Saruman's Footman legal to play
More than any other color, mono-black has staples that can fit in just about any black-using deck, regardless of its game-plan or construction
Honestly, theres definitely worse things you can spend three mana on, especially if you have sacrifice outlets
It can be built as a control deck that copies removal or combo focused on big spells like Time Warp and Jeskai Revelation
So why havent I broken down and built a Sliver deck before
It had some minor other notes to play, such as being part of the theoretical Extended Yawgmoth's Bargain deck I was asked to build to show how often it could kill on turn one, and providing the method of execution in some other cases, but Cadaverous Bloom is all about the Prosperous Bloom deck