So using a card from your hand as a resource is clearly not a new mechanic
Some players value reprint value, some value raw precon strength, some value ease of upgrading
Thickness of 1 Side (microns): Dragon Shield Perfect Fit Sealable (75), KMC Hyper Mat (115) 100 Double Sleeved Card Thickness (mm): Theoretical (68), Practical (72) Water Test: Pass Deck Box Fit (mm storage): Fit: 100 good
From Exodus onward, the expansion symbols are also color-coded to denote rarity: black for common and basic land cards, silver for uncommon, and gold for rare (the Time Spiral set featured an additional purple coloration for "timeshifted" cards [1] )
Aurora, Dreaming Guardian is the ideal combo card, working with the rest of your Sapphire deck to keep that lore going up and your characters safe
Additional options (finish, condition, etc) are also available