The Japanese version of Fate/Grand Order will get a new event, Chaldea Fairy Knights Cup: The Second Victory, starting in early November 2022. Players will need to have completed Lostbelt 6 Avalon le Fae in order to play the main event story. However, there are some event quests that are separate from the plot. For those ones, players will only need to have finished Fubuki.
Chaldea Fairy Knights Cup will also put a new SSR Servant into the gacha pool. So far, we only know the silhouette of this Servant. We do not yet know what class she will be. In the silhouette, she appears to be holding a sword, so it is likely that she will be a Saber. The Servant is Britomart, who is a female knight from The Faerie Queene. The Faerie Queen is an English epic poem by Edmund Spenser, and it is one of the longest poems in the English language.
In commemoration of the Chaldea Fairy Knights Cup event, Fate/Grand Order is re-running some limited Fairy Knights from Avalon le Fae. Morgan, who is an SSR Berserker and one of the most popular Servants on the Japanese server, will be in the gacha until November 10, 2022. It is likely that the event will start after the banner ends, which is also when we will get more information about it and Britomart.
Fate/Grand Order is available on mobile devices. The Chaldea Fairy Knights event will run in early November 2022, along with new Servant Britomart, on the Japanese server only.