FGO Seraph 2nd Ballet - What's New in This Event FGO Seraph 2nd Ballet event is now live. Developed by Delightworks and published by a subsidiary of Sony Music Entertainment, FGO is a free-to-play turn-based role-playing mobile game that was first launched in Japan, but the game’s huge success in the market convince developers to release it for a broader audience. Currently, FGO Seraph 2nd Ballet is the game’s latest event that officially went live yesterday. Below, you can take a look at what the new event brings in: 100 Mission Event: Use the Event Craft Essences to generate additional enemy spawns for more efficient mission progress.