When it becomes public (stack, battlefield, graveyard, exile face up): you swap in the actual double-faced card
The other thing that Magic: The Gathering players should take into account is the mana curve or amount of mana each card requires to play and how many cards share that same requirement
Top-loading The way cards are inserted into the binder pages from the side or from the top can impact how secure they are
As you grow more comfortable, you can take cards from boosters to upgrade these decks, or vice versa, take the unique cards from here into your other decks
Just buy the card you want instead. What makes services like Whatnot so distinct from random auctions on marketplaces like eBay, or even luxury services like Goldins, is the community aspect
In addition to this, you can challenge an exerted rival character which you resolve instantly, exerting your character and then having both characters deal simultaneous damage