That new card will have access to all your mana while giving your opponents almost no window of time to prepare for it, so your odds of successfully clearing the board with a Cyclonic Rift, executing a combo like Narset, Parter of Veils and Windfall, or pulling back a powerful effect with Flood of Recollection are higher than normal
Jhoira of the Ghitu was the go-to commander for time counter shenanigans for a long time
Cards like Loxodon Smiter play for the early game, while Trostani wants to go long
Baron Rivalry Deadly Dispute is among the best Village Rites variants ever printed, and its a joy to play with cards like Hecteyes and Black Mage's Rod
Ornithopter, Lotus Petal, Everflowing Chalice, Swords to Plowshares, etc., all work towards building your storm count quickly and as cheaply as possible
External Media TV shows, movies, and mobile games (like Pokemon GO) can unexpectedly boost certain cards' popularity