Throw in a Haste granter like Lightning Greaves, and you can have this engine online surprisingly early
No dredge card is stronger than Golgari Grave-Troll, a powerful enabler that managed to get banned in Modern twice
(Any other effects that would happen after applying Weakness and Resistance still happen.) Flip a coin
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
Each land produces a certain color of Mana: white (Plains Lands), blue (Island Lands), black (Swamp Lands), red (Mountain Lands), and green (Forest Lands)
It's also just as good on the defence