They just have some vulnerabilities, and their prices reflect that
they can't contain more than one copy of the same card except for basic lands
The opponent and the turn player are obligated to immediately discard a card and pay half their Life Points, respectively
In addition to those 8 cards, youll find 5 standard Pokemon booster packs (which sets these are from is unconfirmed), 7 fun packs (these are booster packs which contain 3 cards each, though its not known which sets these cards will be from), 2 Pokemon coins, 2 Pokemon sticker sheets, a Chien-Pao sidekick dangler and, finally, a code card to be used in the digital version of the Pokemon TCG
Potentially bias for loving Stoneforge, but Im liking it more than the Intrepid Adversary-tier beaters
Basically, everything that is very unlikely to contain a card shape is discarded