I think the design space for a powerful deck is absolutely there, making the first face-down creature spell you cast each turn effectively free and making all face-down spells cantrip massively empowers the deck
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Enter the Unknown: Enter the Unknown's effect allows you to play an additional land during your main phase
Those can be wincon threats on their own and interact with All Will Be One repeatedly
Its naturally weaker in 1v1 formats, as boards usually wont have 13 creatures on them, so cards like Damnation become better options
We're also getting a few in-universe sets, specifically Lorwyn Eclipsed , Secrets of Strixhaven , and Reality Fracture
What was your experience like, and how much of an upcharge did you pay