2 Emet-Selch, Unsundered/Hades, Sorcerer Of Eld From FFXIV Fill Your Graveyard, Then Use It As Your Second Hand Though Emet-Selch won't completely eradicate the board like a Rejoining eradicates a world, he can be dangerous if allowed to go unchecked for long enough
This card also has an uncut collectors edition and uncut forgien edition, they are worth $500
If you're new, Craterhoof is one of the best closers in MTG and has dished out many a loss in Commander since it was printed
While this particular card isn't worth anywhere near as much as the number one spot on this list, it still sells for a very respectable amount
It was a nightmare
What you need to get going is a Relic of Legends, which can let you tap an untapped legendary creature to add one mana of any color, and Acererak the Archlich, a three-mana Zombie Wizard with an enter the battlefield trigger to venture into the dungeon