Disperse

In Commander, Disperse is a tempo play in a format where tempo rarely wins games — resetting a problematic permanent is fine, but paying two mana to delay rather than answer something is a tough sell when Cyclonic Rift and Reality Shift exist at similar price points. In Pauper, the commons restriction makes Disperse more viable, and the lack of competing options at this cost raises its stock meaningfully. Legacy, Vintage, and Modern have enough strictly better interaction that Disperse doesn't see serious play in any of them. Pioneer offers the clearest case for it in a pinch, but dedicated bounce usually finds Brazen Borrower first.