Then put those cards onto the battlefield under your control
Nibelheim Aflame [Borderless Foil] #339 Magic Final Fantasy Keep track of your collection value over time
Top 11 Artifact Creature Cost Reducers Foundry InspectorFoundry Inspector Etherium SculptorEtherium Sculptor Cloud KeyCloud Key Jhoira's FamiliarJhoira's Familiar Ugin, the IneffableUgin, the Ineffable Enthusiastic MechanautEnthusiastic Mechanaut Starnheim CourserStarnheim Courser Urza, Lord ProtectorUrza, Lord Protector Tamiyo, Compleated SageTamiyo, Compleated Sage Saheeli, Filigree MasterSaheeli, Filigree Master Herald of KozilekHerald of Kozilek Why 11
Then the more valuable cards are harder to come by, with Legendary cards coming in at around every 5 packs
However, Rattlechains makes your other Spirits a fair bit better, both protecting one, and giving future Spirits flash (which works great with Topplegeist and Spectral Shepherd)
And if they discard cards to prevent life loss, its only upside to you
