mtg black demon cards Mono-Black Demons Rogue Shadowmage and Shrieking Affliction Demon Token | Magic Origins

For the same mana cost you can get something like Ghalta and Mavren

In Commander his deck should contain plenty of red cards with high mana values and casting cost reduction, such as Blasphemous Act or Volcanic Salvo - you want cards that you can pitch to get a huge Blazing Shoal pump, but which you also have a good chance to cast normally

Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Altar of Dementia: The number of cards the target player puts into their graveyard is equal to the power of the sacrificed creature as it last existed on the battlefield

Which is good