#10 I always liked this dumb guy: He's pretty borderline, but, depending on your composition, can be pretty "on theme"
With powerful stage-1 gameplay via "Dragon Rage" and "Bubblebeam," combined with Mitsuhiro Aritas striking artwork and scarce print runs, Gyarados is a legendary investment pickbridging striking visual appeal, rarity, and strong collector nostalgia
Games start without a monarch
Tapping lands for mana is the most common, but you can also have creatures, artifacts, and other permanents that can generate mana
These were the first print run of any given set and are almost always more limited in quantity
It brought counters and Phyrexian decks natural synergies in a clean, well-statted package for one of my main cubes, The Curio Cube