Their gameplay style revolves around monsters with 2500 original ATK or original DEF, who have the ability to summon themselves by revealing monsters with either statline (or both, in the case of the boss monster "Regenesis Lord") and support monsters with the statline using their effects and Spell/Trap cards
Things go a tad bit further than that, however
Also, they must have a good reputation in the Magic community
Notable Cards: Reprints and $$ While there are no huge money cards in the precon, there are still some notable inclusions that can be used in plenty of other decks or sold
This card is at the core of many decks in the game, as Blastoise ex, Articuno ex and Gyrados ex all use Misty to enable their attacks to be more consistent and occur on earlier turns than most other matchups
That or you can cascade into Profane Tutor and cast it without waiting