So far, examples found include Energy cards that were found in Rebel Clash booster packs in the 2020 Trainers Toolkit, as well as Sword & Shield Base set Commons/Uncommons and Vivid Voltage reverse holos
Lets see some examples: Wax / Wane has two names: Wax and Wane. Its a green and white card with a mana value of 2
Like most Pokmon cards, the value of Marnie's Morpeko depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Scarlet & Violet Promos)
Make the most of the interactive tutorial to learn the basics
Some of that card art dates back to the original Base Set, while other cards use artwork previously found only on promo or Japanese-exclusive cards
Self-Destruct, for example, would have been a nastier component of the already rampant Mono Red, especially with the knowledge that one of the winning moves for it was to blow up a Heartfire Hero using it