Imagine every card on this list, but doubled
Mirrorshell Crab isnt a super-efficient one, but in a counterspell war, this artifact creature can only be countered by other Stifles if they lack the mana, so thats pretty good
These two are among the best Food cards, and this seemingly slow combo can become a real threat with sacrifice synergies or lifegain
Fencing Ace is the white version of Champion of the Flame
As cards get more expensive, making fake cards becomes more lucrative, in part because the number of players who can afford a legitimate Underground Sea or a playset of Mox Opals gets smaller and smaller
Facilier, Agent Provocateur similarly bring banished cards back to your hand, making Amber and Amethyst the ideal deck if you love playing lots of low-cost cards and dont want to see them lost to the discard pile for the rest of the game