: Hugh Anthony Disward inherits a mansion from his grandfather containing the Bookshelf of Dantalian , a gateway to a library of "Phantom Books".
In the 35th episode of Season 1, the Turtles venture into a secret, supernatural library located within the Hidden City. [S1E35] Mystic Library
While not an "episode 35" (as the anime consists of 12 episodes), this series is the definitive "mystic library" narrative. : Hugh Anthony Disward inherits a mansion from
: The library is run by the Bat Librarians , creatures who demand absolute silence. : The library is run by the Bat
: He meets Dalian , a young girl who is the physical embodiment and guardian of the 900,666 mystical tomes.
: Donnie’s refusal to follow the strict rules of the library leads to a chaotic showdown with the guardians and the "Hush-Bats."