That voice belongs to the Crystal Exarch, the self-appointed guardian of a world called Norvrandt ("The First" to the celestial-inclined), and he, like his world, require your god-slaying talents because all their own heroes are long dead
For a more in-depth explanation of how to play, including mechanics such as Shift and Rush, check out the instructions on the Disney Lorcana website
One of Disney Lorcana's Rise of the Floodborn starter decks is an Amethyst/Steel deck that focuses on the expansion's two new mechanics: Resist and Bounce
Grading can enhance the value of your Disney Lorcana cards, especially if they are in excellent condition
Not intentionally, of course, but by being so obsessed that it creates something of a barrier to entry for the casual crowd and kids who want to dip their toes into Disney Lorcana