Mega Greninja's underlying art happens to work particularly well in monochrome gold because the ninja design relies on silhouette and motion rather than colour palette
11 Quick Sliver Full-Art Foil - $78.88 Slivers do a lot of things that break the game in terms of traditional rules
As recounted by Christopher Nitz, former Senior Prepress Systems Analyst at WOTC, in the CGC article, creating test prints was expensive for WOTC
Summon: Titan I think Crystalline Armor is underrated, but if I spend one more mana, I get some self-mill, get a potentially huge ramp in land, and a one-time Crystalline Armor
The game is always changing and getting harder
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