A new leak from Honkai: Star Rail is teasing the next boss coming to the Simulated Universe in Version 2.3, adding playable character Aventurine as a new challenge. Debuting with the game's launch, the Simulated Universe has become one of the most popular permanent game modes for the HoYoverse sci-fi RPG. The Simulated Universe features multiple unique worlds for players to challenge for rewards like Stellar Jades and Planar Ornaments, as well as alternate challenges like "Swarm Disaster" and "Gold and Gears." Now, a familiar face is set to be the game mode's next boss.