Wrench Mind, Unearth, and Eliminate may all be better at their individual functions, but a jack of all trades is often better than a master of one
6) Use the live preview like a sanity check Before you call it finished, do the arms length test: Can you read the name and mana cost easily
Prowess and spellslinger Commander decks that still run a decent amount of creatures should consider these cards for the triggers, especially the lower mana value cards
Note: For surge foil tokens, the front and back token combinations may be different than those found earlier this year
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