Technical Authentication & Grading (TAG): TAG uses computer vision technology to produce very detailed reports of the condition of cards
Theyre definitely not the most competitively viable ones (though I consider game-winning potential to be a necessary ingredient in making cards or decks feel good)
Though playtest cards are illegal by default, if your playgroup is fine with you using them, you can "rule-zero" them and play with them anyway
However, none of the 12 promo cards that came with the toys featured Hoopa
Instead of discarding like Rotting Regisaur, players must exile two cards from their graveyard
While Shadowverse mechanics revolve around a Play Point mechanic used to play Followers (key monsters), Spells (fast-action cards), and Amulets (longer-lasting buffs), the game is unique in having an Evolution mechanic, where Followers gain new effects after evolving in a match