In Black, that usually means sacrificing a 2/2 zombie or sacrificing creatures is what you want from your deck
The kind that also makes Narset, Parter of Veils an absolute nuisance
If neither of the above conditions apply to you
They're trash cards on their own and I have yet to see anyone else play with them, but they have an interesting interaction with one card in particular that is heavily played in Commander: Nearly every Commander deck that runs black will run Urborg, Tomb of Yawgmoth, either for mana fixing and/or for its synergy with Cabal Coffers
Chase card: Victini - 172/086 at $549.43
Magic: The Gathering features a colorful variety of formats for gameplay, from booster draft Limited to cool constructed formats like Standard, Modern, Legacy, and certainly Commander