It costs no mana once its in play and can dominate games
A few in-demand cards might fetch a bit more, but in general, bulk Pokmon cards turn a profit because of their volume
By providing cards like Surtland Elementalist, Ethereal Valkyrie and a strong ramp package of Replicating Ring, Sol Ring, Arcane Signet and the new card, Stoic Farmer, the ease of casting such high costing cards allows one to better deal with difficult board states later on in the game
Counterfeit concerns run high
Its important to note that these boxes are only really available for preorder, so there are very few boxes that players can even claim for release day at this point
Its just a 2-card collector booster, with one card being a rare or mythic from the set and the other being a foil common or uncommon