It's a strange combination, as Storm is typically associated with Izzet decks, but it works here thanks to the sheer aggression and generally low costs of most spells in the deck list
This means you can self-mill as a cheaper form of card draw, or you can sacrifice artifacts to cards like Kuldotha Forgemaster and still get them back
Too often have I seen people resolve this spell and the player next in turn goes for a win, while the controller of Teferi could not stop that player from winning
If youre looking for a quick summary, heres my current tier list for the most popular decks of the format: Tier 1 : Giratina VSTAR, Charizard ex Tier 2 : Mew VMAX, Miraidon ex, Gardevoir ex, Lost Box Tier 3 : Snorlax Stall, Inteleon VMAX / RS Urshifu VMAX, Roaring Moon ex, Iron Valiant ex Please note that this is a summary, not a complete list
7-cost EustassCaptainKid, 3-cost Roronoa Zoro, 4-cost Trafalgar Law, and 1-cost Nami are the strongest cards in this starter deck, but they can be picked up in other boxes, so you arent forced to buy the ST10 to collect them