Which decks are you going to slot them in, and which legends are inspiring you to build new decks
MDFCs have long been a deck-building hack as long as you are willing to use them as lands when needed

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It looks like the strongest combination of imperial orders and orders (while looking away from the RBI) A Tribute Summon that requires a monster with specific conditions, but for some reason it has a sentence that says "I can't do a Special Summon"
What they can do, however, is provide late-game board-changing bombs you'd never see coming
Practical Tips For MTG Collectors Protect Your Cards Early Sleeve valuable cards as soon as possible and store them somewhere dry, clean, and safe