good black cards mtg The Best Card? Cabal Therapy Top 30 Cards for Mono-Black

Debtors' Knell There is a ton of synergy that you can run in order to get the best value out of the Debtors' Knell and the ongoing sweet card advantage it brings to the battlefield

For Gruul mana-fixing, I recommend prioritizing dual lands that count as both Forests and Mountains: Cinder Glade, Stomping Ground, Sheltered Thicket, and Taiga (if you're willing to spend lots of money) add layers of extra synergy to the deck because they can be fetched by lands (Wooded Foothills) and spells (Wood Elves) while also empowering cards that care about land types like Valakut, the Molten Pinnacle and Howl of the Night Pack

Cards like Phyrexian Arena are also staples across formats, allowing you to have game against slower decks while slowly burying them in card advantage

Missing Underprinting: Cards that are missing the underprinting layer have a uniform foil effect across the entire surface