It is not to be used during a duel, but you can swap cards between it and the main and/or extra deck between the duels in a match
If you don't play the card by the end of the turn, it will remain exiled
Last but not least the crme of the crop when it comes to supporter based Pokmon recovery Nessa and Tulip
Secret Lair x Marvels Spider-Man: Villainous Plots Secret Lair x Marvels Spider-Man: Villainous Plots 1x Deadly Dispute (FCA foil $2, SLD foil $4, SLD foil $6, 409k decks) 1x Go for the Throat (PCBB foil $5, 233k decks) 1x Lightning Greaves (INV foil $215, SLD foil $37, 2XM foil $19, SLD foil $16, LCC foil $22, SLD foil $6, 1.7 million decks) 1x Sol Ring (too damn many, all of them) 1x Command Tower (too damn many, all of them) Im lower on this drop than I am with the Heroic Deeds version, as Dispute and Throat arent very pricey and as I said, these staples will hold a few bucks but are unlikely to become very expensive
When most people talk about the staples of a Commander deck, they talk about ramp, draw, and removal