Starting with Plains Donnys half and mine the intention was to continue on whenever the time was right
They are proof sheets, color test prints, production samples, and prototype cards that were produced during the development and setup phases of a print run and were supposed to be destroyed after serving their purpose
Once Chansey has 4 Energy attached to itself, Ken will *sometimes* use Double-Edge
You travel through those rooms by activating cards with a Venture ability - every time you Venture, you move one room through the map
Looking back, Chaos Orb is like the progenitor of later artifacts like Oblivion Stone, which can destroy other permanents in more conventional ways
Wizards are clearly pushing hard here, and that makes sense