Crovax the Cursed is easily the most interesting of the bunch and it still isn't great
PSA Graded vs Raw Card Values Why Grading Affects Value Authentication: Confirms card authenticity Condition Verification: Professional assessment Protection: Sealed in tamper-proof case Market Confidence: Buyers trust graded cards Population Reports: Rarity data available PSA Grade Value Multipliers Pro Tip: When to Grade Your Cards Only grade cards worth $50+ raw that appear to be in excellent condition
The first Class ability is active as long as you control the Class
When gold cards were first introduced, not only were many of them not particularly strong, but they had a unique restriction all their own, because these cards weren't just special
see the above note about getting a Sliver that gives your Slivers haste
Roger # 118 Gold Manga, from hard to find raw cards at $2000, up to an isolated private sale of a BGS10 pristine sold for $45,000 in January on eBay - the gold aspect of it is another uniqueness collectors are craving for