The Silver Tempest SIR pool has 8-10 cards including Lugia VSTAR, Alolan Vulpix V, Serena, Regidrago VSTAR, Regieleki VSTAR, and Unown V so opening 3 booster boxes might yield 1-2 SIRs, likely not the specific ones you want.
Those who enjoy opening Sealed Booster Displays and value different Rarities will find a fitting choice here
Therefore, it is still better to use only official cards from the Pokmon developers, the main goal of which is to present a quality gaming experience
a low growl, only feet from where you stand
The card features a picture of Pikachu drawn by artist Atsuko Nishida - best known as the original designer of Pikachu - with its text translating from Japanese as: We certify that your illustration is an excellent entry in the Pokmon Card Game Illust Contest
Like all League Battle decks it will have a beginner friendly RRP of $29.99 (29.99), but it's built to stand shoulder to shoulder with other competitive decks