The third major update (Version 4.0) of Genshin Impact, which included:
• New characters: Lyney, Lynette and Freminet
• New region, Fontaine, with new areas: Belleau Region, Beryl Region and Court of Fontaine Region
• New gameplay mechanics: Underwater Exploration
• New combat mechanics: Arkhe (Ousia and Pneuma energy)
• New main story quests: Chapter IV, Acts I & II
• New story quest for Lyney
• New main event: Mega Meka Melee
• …and more!