If youre interested in powerful things, though, I do have one quick honorable mention before I get to my Top 10 for broader Cubeability Now lets get to the list
Bribery Bribery was one of the earliest boogeymen in EDH, before it became Commander
Sadly, editions from some years are have consistent issues with curling
I aim for known factors, cards that have existed in the card pool for quite some time and either dropped off or never really took off in the first place
Whether Near Mint, Played, or in slabs, we accept all conditions
Why would you want to limit card draw to once per turn in an aggressive deck so focused on gunning down opponents before they hit a stage of attrition