Think of it as the tutorial level of a video game
In the end, the possessed Greiger was defeated by Crow in the Shadow Turbo Duel, during which Chacu Challhua was destroyed as well
Since land destruction is such a controversial strategy, and Wizards has consistently tried to move away from it, its very unlikely well ever see a legendary creature card that truly enables it as a strategy
That poem-like chant in the flavour text notes that he wants 'bones in your grave to rattle no more', while his effect prevents Regeneration -- a keyword that tends to be flavoured as undead creatures springing right back to life
Players later in the turn order will know if players before them are exiling their hands, but they don't get to see what those players will exile to help them decide whether to exile their hands themselves
Its best not to link an account with your email or Nintendo ID if you plan to restart multiple times until youre satisfied with your cards