Each Strixhaven draft and set booster includes one Mystical Archive card, and collector boosters have at least three of them
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Notes and Rules Information for Noctis, Prince of Lucis: You pay all costs and follow all timing rules for artifact spells cast with the permission granted by Noctis's last ability
Thats not to say that you wont find powerful cards in a Set Booster indeed, each pack of 12 cards (plus two bonus, non-game cards such as art cards) contains 1-5 cards at the Rare or higher rarity level, making them a more appealing product in some ways than, say, Draft Boosters
3 from the main set, and Coruscation Mage and Gleeful Arsonist
As I say, there's a lot going on for a fairly high cost, and I struggle to see this card seeing too much play given the setup required to cast it for its Shift cost, especially in Ruby & Steel decks which typically skew far more aggressive
Non-slip rubber backing keeps the playmat from shifting during use