On the bright side, you can give the sweet Mewtwo quote from Pokmon, The Movie: Mewtwo Strikes Back and claim that it was something you came up with on the spot
"I know because I'm a Ward, you poser
Black Lotus is considered the most powerful and most desirable Magic card ever printed
We're going with 18, which probably seems light, but when you consider we have 11 mana dorks (and 14 if you count Marwyn, the Nurturer) along with four copies of Once Upon a Time, the number of mana sources is actually much higher
As noted in a recent Reddit thread, Who hasnt edited their deck to exclude EX Pokemon, fight the computer and win, only to find out that you have an alt art card in the deck so the mission requirement isnt met? Related Others called this task a dumb mission and suggested that the developers clarify the phrasing for players
Put your treasures in a long box, and make sure that your picked bulk is clearly marked as such so that you dont go through it again for a while