Princess Leia I think Princess Leia works well as a Commander, not just in the context of Star Wars cards, but in general
So if you can get a turn one Foulmire KnightFoulmire Knight, or even a turn two Wintermoor CommanderWintermoor Commander, youre off to a fantastic start with a significant card advantage engine from Sidars Eminence
As a result, Angel decks built around Avacyn establish near-unbreakable board states that favor longer games
If that sounds fake to you, show me another card that generates 10 power and toughness for six mana out of the can
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
Even if youre not trying to combo off, most Commander decks will have enough artifacts (either as delirium fodder or in token form) to give Grinding Station an impressive per-turn output