Eternal Format All Stars that rarely make it in powered cubes: Why and what conditions would make them good?
This is inspired by thinking about [[Kozilek's Command]], a card that is a dominant force in modern and legacy but because of the two colorless pips is not something that generally makes it into vintage/legacy cubes. I think some shift to make the package of modern/legacy eldrazi an interesting thing to include would need to happen, I think that's unlikely philosophically for cubes and as a likely are for further power creep in that particular archetype.
Conversely, perhaps not an "all star" anymore but a legacy-pedigree card in [[Goblin Welder]] somewhat recently saw the conditions to be worth including arise in powered cube.
This makes me curious about any cards on your radar as a card that just needs the environment to shift enough to be good.