Many black decks in EDH revolve around treasure synergies or typal synergies, and having this black enchantment around improves both
The best Magic: The Gathering Bloomburrow Commander isn't as glaringly obvious as it is during some set releases - Wizards of the Coast has done a particularly excellent job with this wave of preconstructed (precon) decks, such that each one has some appeal as a potent strategy while no clear favorite has emerged
A physical card on your doorstep in two to three business days
Now, a barrage of upkeep triggers from Subversion and Palace Siege wont exactly lead to an engaging play experience, but they do reinforce a unique take on the archetype: slowly draining the table until one player finds themselves at a slightly lower life total than the others
Keep a wide array of permanents on the field and keep your opponents boards small by removing their permanents before they can use them
The black half handles removal with cards like Overkill and Sephiroth's Intervention, with the blue half having counterspells such as Syncopate and Louisoix's Sacrifice