Either way, the strategy is simple: Get some spells payoffs on board and then, you know, cast spells
My guess is that Amulet of Safekeeping is R&Ds attempt to try and answer the question of how to ensure that Modern players can sideboard against multiple strategies at once so that your progression though a large Modern tournament is less matchup dependent
Prioritize Protection: Use sleeves and toploaders for valuable cards regardless of storage
We are going straight to the High-End Reserved List with some familiar old faces: Mirage Lion's Eye Diamond (English - GD) Lion's Eye Diamond (German - NM) Tempest Intuition (German - EX) Urza's Saga Gilded Drake (German - NM) Yawgmoth's Will (German - EX) Serra's Sanctum (German NM) Single Foil There's only one foil card worth mentioning and that is Sheoldred, the Apocalypse (German - NM).
The absolute thrill of opening those Legends so that they could be inserted into Collector Boosters was a special, unforgettable experience, and you can read more about it in Mike Turian's Collecting Dominaria United article
Every attack fills your graveyard, which helps put your juicy targets like Valgavoth, Terror Eater where you need them