Fill up your graveyard and Cloud of Darkness becomes a creature with a powerful removal ability
Just like everyone else, I thought the ability would be some kind of drawback when I first read the card, but no, its just a creature that synergizes perfectly with what Golgari and Dimir are trying to do in the set
There are currently 250 base cards in Pokmon TCG Pocket, including 226 cards you can get in Genetic Apex, and 24 Promo cards you can grab in Pokmon TCG Pocket during in-game events, like the Wonder Pick event that's ongoing at the time of writing
Cards with basic landcycling can get Plains, Island, Swamp, Mountain, Forest, or Wastes, plus their snow-covered land counterparts
The problem is that tokens and basic lands show up in every single pack, which means their supply and prices will be heavily dictated by just how much Unstable sells overall, which in turn means any discussion of Un-set finance is built on the foundation of total demand for the product and set sales