This is because they are legal on a case-by-case basis , rather than a blanket allowance or ban
The customization options are the same regardless of whether you're ordering one card or a full pack
Building the Deck Sauron, the Dark Lord is good at building armies, drawing cards, and dumping cards into your graveyard, so we're going to build around doing all three
We might not want to get so fancy, instead just using Avacyn as a raw power card: Creatures (13) Planeswalkers (2) Lands (26) Spells (19) Here were not really maximizing Archangel Avacyn, but its still a great card, and this way we get to put it alongside a bunch of other great cards
He enjoys having great duels with worthy opponents and will be disappointed when denied a proper fight, either because his opponent was weak or because Gilgamesh feels that he is not able to fight at his full power
Relentless Rabbits (version #4) 1W Creature Rabbit 1/1 When CARDNAME enters, create a number of 1/1 white Rabbit creature tokens equal to the number of creatures you control named CARDNAME