derpy pokemon cards pack POKEDERP Parody Pokémon Derpy Pokemon | eBay

First, there needs to be something worth copying when it enters the battlefield

Cross-check completed listings on major platforms to see what that card usually sells for

Dramatically increase the power of this Vampire Tribal precon with an optimized $50 upgrade

However, while its certainly not a large pool of buyers by any stretch of the imagination, the game has been around long for a long time (literally decades) and still maintains a large enough fan base that I can see there being a limited pool of people with means that would gladly be willing to put up that much money to buy that card

This interferes with prowess as your opponent can no longer freely spam noncreature spells, buff up their creatures, or benefit from those spells effects