Most decks become meta through playtesting
Although the cumulative upkeep can eventually become too costly to maintain, the value it offers within its first few turns is often enough to put you ahead
Chart shows the price of Acerola #201 at the end of each month going back as long as we have tracked the item.
While the Mega Ultra Rare Lucario might top the list once its market price is available, Lillie isn't going to give up the crown easily, thanks to her roughly $300 value
Yes, you need a deck that can reliably provide evasive creatures to enchant, and that creature is probably going to die within the next 3 turns or so, and by enchanting it you're adding extra incentive for your opponents to kill it, but all those risks are worth the payoff of drawing more than 1 card for just 1 mana
Each of the six SARs in Inferno X boasts something distinct and eye-catching about its artwork, but Charizard's incredible attention to detail