Finally, win conditions such as Iymrith, Kairi, and Silumgar, the Drifting Dead will finish off your opponent
Ive used it on turn one to stop a mana dork, and on turn six to shut down a Voltron commander that was about to end me
The inevitable downside is that you must exile two cards from your graveyard each upkeep to keep Egon in play
That said, Possibility Storm was mostly unplayable from a competitive perspective because the deck-building cost was too high, until the right support mechanic (adventure sorceries) came along and made it into the centerpiece of a legitimate deck, so it might just be a matter of time until something breaks Unpredictable Cyclone as well
Let me know in the comments below who your personal picks are, and which commanders I should consider for the sequel
Dream Leash