Apocalypse monks of the Andurax

The Apocolypse Monks of the Andurax, (TV: The Return of Doctor Mysterio) also known as the Vigilant Eremites of Andurax, (COMIC: Ghost Stories) named the gemstone that Grant accidentally ingested in his youth the Hazandra, the ghost of love and wishes. Later, Grant named his superhero identity "the Ghost". (TV: The Return of Doctor Mysterio)

The Twelfth Doctor, Grant, Lucy and Jennifer visited the Vigilant Eremites. (COMIC: Ghost Stories)

The Eremites power up the Nether Gate of Tersimmon. (COMIC: Ghost Stories)

According to the Doctor the Eremites had been caretakers of the Nether Gate of Tersimmon for a few hundred million years. He knew four of them who he nicknamed Grumpy, Sleepy, Bashful and Ethel. (COMIC: Ghost Stories)