The set also introduces new Terastal-type Pokmon like Terapagos, which play a pivotal role in the Pokmon TCG metagame
The Regalia The Regalia is a lot like a vehicle version of Sword of the Animist
Decks like @Ignister, which can quickly spit out Monsters to link climb fast, can take advantage of the Mathmech engine for more support of the same typing
While just enchanting things for value is a fine, fun way to play Estrid, the Masked, things can get out of control quickly if you start playing cards like Overgrowth and Fertile Ground so that Estrid's +2 acts like a massive ramp spell, and then The Chain Veil (perhaps enchanted with a Mask aura thanks to Estrid's 1) give you an easy way to activate your Estrid, the Masked an infinite number of times, potentially making infinite mana by untapping your lands and eventually winning with her Replenish ultimate
As far as the Mysterious Fossil and PokeDoll, I'm not sure
Remember how I keep harping on Wurmcoil Engine