Fine card, but not a great addendum incentive
Evaluating Market Demand: Factors Influencing the Value of Gold Pokemon Cards The value of gold Pokemon cards can vary depending on several factors, including the cards condition, the featured Pokemons popularity, and overall market demand
Spoiler : In order to make this a difficulty hack, you would have to have the NPC's play cards like a normal human, and I don't have the AI coding skills for that
This is permanent Creature theft
Combine this with overwhelming colors and despite being rarer to pull, this card is cheaper than its ultra-rare counterpart
Or do what an increasing number of people do, and build an MTG Commander deck - it's a lot less painful to buy that mythic rare when you only need one copy.