Oma Advent Calendar

"According to this book, today will be a very special day for you."

- Woz to Sougo Tokiwa

The Great Calamity Coming Calendar (逢魔降臨暦) is a book from the year 2068 which details the rise of the overlord Oma Zi-O, whom supposedly began as Sougo Tokiwa. It is held and consulted by Oma Zi-O's servant and prophet Woz, who seeks to preserve the history of his master.

Record
Through this book, Woz was aware that Sougo Tokiwa first transformed into Kamen Rider Zi-O, which Woz viewed as Sougo's first step to one day becoming King of the world. Traveling back to this day, Woz told Sougo that it would be a momentous one for him, but that he must beware the "red robot". Indeed, after Woz appeared, Sougo was attacked by the Time Mazine, a red-colored giant robot piloted by Geiz Myoukouin, whom also travelled back from 2068. When Sougo unlocked the Zi-O Ridewatch, Woz appeared before him again and urged him to use his new power to shape the world to his will. Sougo, having been made aware by Tsukuyomi that Oma Zi-O was the most despised tyrant in history, vowed to instead become the greatest and most beloved king. Though this came as a surprise to Woz, he nevertheless provided Sougo with the Ziku-Driver which enabled the youth to achieve his fated transformation into Kamen Rider Zi-O.

Appearances

 * Zi-O logo.png Kamen Rider Zi-O
 * Episode 1: Kingdom 2068
 * Episode 1.5: Mystery of Naming
 * Episode 2: Best Match 2017
 * Episode 3: Doctor Gamer 2018