They are really hard to pull, but even then, some of them might not be rare in terms of price, as these are determined by various factors such as the art, the usefulness, or the Pokemons popularity
The archetype also has the capacity to make additional in-theme or non-in-theme Fusion monsters, such as "Mysterion the Dragon Crown", "First of the Dragons", "Quintet Magician", and "Dark Magician Girl the Dragon Knight"
So the city-state conquered an empire (a maritime and mostly hegemonic one in Athens's case, but an empire nonetheless) basically to supply the capital with cheap slave labor
As an added bonus, you can even stack two of these on top of each other, or besides each other, to double or quadruple the amount of decks you store, while still maintaining a professional look
I have seen a list with Sinkhole but as with Wastelands I think that you are spreading this list too thin if you try and attack each resource directly