Without further ado, lets get to the list
If Alisaie Leveilleur and Alphinaud Leveilleur are your commanders, your deck may contain cards with white and/or blue in their color identity, but not black, red, or green
#15 I like the idea but also hope they don't lowball the cards that people bring in on trade or sell like they do the games
Vance's Blasting Cannons is perhaps the most aspirational card on this list but is almost perfectly serviceable as just a red howling mine (do we have a good name for "effect that draws you another card each turn"?) It notably doesn't let you play lands, but cards like Outpost Siege don't give you the story equity this card does
Mew [Holo] #4 Pokemon POP Series 4 Keep track of your collection value over time
Its a beefy 3/4 for 3 mana that draws cards when it attacks and becomes indestructible if you control two other merfolk