Rumors have always been a part of Pokmon games Maybe its because, ever since the original Pokmon games and cards first launched in the 90s, the company behind the franchise has embraced ambiguity and kids sharing rumors on the playground
you need to buy them
Official DB Cross-check: Search the card number at world.digimoncard.com
However, I think this can be a great way to experiment with yourself because you can print your own design, print it on a piece of paper, and put it on top of the middle frame so you will have a different frame illustration design
While some are better than others, here are some potential considerations: Night's Whisper/Sign in Blood (Can target opponents in a pinch + politics), Read the Bones (scry is useful) or a Syphon Mind (expensive cmc but is usually draw 3, each opponent discards one)
Another Sugimori masterpiece, the holographic Scyther is valued at $5,500 in a 10 grade