It got added to the file then and there
Sideboard options may be printed on the reverse of other cards so you can easily flip the cards to change up the decks power level/ art spice level to suit your playgroup
In an artifact-heavy deck, this could mean all sorts of shenanigans on turn one, and easy casting for expensive artifacts later in the game , leading it to be perceived as one of the most powerful cards ever printed
Players with few numbers of wild cards should stick to crafting dual lands in their preferred colors and wait for the metagame to develop before crafting anything else
Lets say you have Krark, Sakashima cloning Krark, another Krark copy, and three Thumbs
Theyre also incentivized to go deep on group hug effects that benefit all players even if they do help the bad guy, youre usually still getting 300% of the value they are