mtg best black cards all time Magic The Gathering: 10 of the Best Black Common Cards of All Time Foundations: The 5 Best Black

You can do something similar with Warp cards and a sacrifice outlet

Make your opponents whole deck into a certain color, and then Grindstone mills them out

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There's the 'unstoppable' aspect of it, of course

Underworld Breach Underworld Breach is a fundamentally broken card that gives all your nonland cards escape until end of turn

They hold modular counters well, are often evasive and can even one shot people out of nowhere