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Sorcery speed kills this one a bit, but good card selection plus filling your graveyard is a lot at 2 mana
Kuja, Genome Sorcerer The list takes us to Final Fantasy IX, as an antagonist Kuja brings Rakdos burn-spellslinger to the battlefield
While challenger decks, and in particular Pirate typal decks, may be better suited for Ruby/Steel, this color combination offers some great item synergy and card draw that will help keep you from running out of resources.
Queen of Hearts, Capricious Monarch Off with the opponents head
Unfortunately, seven mana cards just arent really playable in current Standard, and this feels too low-impact for Commander