The last time we had done it was the Ravnica block and Coldsnap , the latter being a big bust
Chart shows the price of Pecharunt [Pokemon Center] #129 at the end of each month going back as long as we have tracked the item.
(Also check out some puzzles I made to see another preview card.) The first is Sly Spy, a Spy with an ability caring about something black-border cards don't
Whammy Burn takes a long time to understand and perform, all to say, deal 0-4 damage to any target via a push your luck minigame
That ends up being a bit more niche than you might think in practice, so while it's certainly playable, it's likely not going to be ever-present either
If the deck can handle playing a colourless land with no upside to get potential benefits while on the draw, then Gemstone Caverns can be maindeckable