There are eight black sources, seven green sources, two blue sources plus Cultivate, and two The Biblioplexes for a consistent late game mana sink
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You can partially achieve this through your Equipment suite
That delay ability prevents you from getting Spider-Man 2099 into play early enough that he could give you a big advantage, but a 2/3 with double strike is nothing to sneeze at , especially with reds access to temporary buffs that can really ramp up the damage
Though it might take a while to get going, the back-n-forth nature of Commander sees multiple creatures hit the graveyard each combat cycle, and with Draugr Necromancer on your side, you not only deny these fallen creatures access to their owner's graveyard, but also get the chance to bring them aboard your team
Make sure its your main phase and the stack is empty, because its time to talk sorceries