This guide for Genshin Impact includes the following:

Based on version 3.0.
An interactive Map of Teyvat showing the location of all; Anemoculus, Geoculus, Statues of the Seven, World Quests, Shrines, Plants, Monsters, Enemies, Chests and Minerals.
Knowledge on all of the current known regions of Teyvat.
Detailed Character pages of all playable characters showing talent trees, skill builds and Ascension tables.
Character Tier Lists.
Combat Information and Elemental Effects & Combinations.
Weapons - Showing the current best and highest rated weapons in the game.
All Archon Quests including the new Sumeru Archon Quests.
All World Quests that are unlocked by speaking to NPCs through Teyvat. They give insight into the various locations and stories of the world.
All Story Quests consisting of chapters related to the background and personalities of each playable character.
All Domains laid bare with expert strategies including the new Sumeru Domains.
How to conquer the Spiral Abyss.
All Weekly Bosses covered with expert strategies.
How to get all the optimal outcomes on Hangout Events
Housing guide using the Serenitea Pot including a full blueprint and furnishings list.
All details on Gardening and Fishing.
Bonus Content, including Interviews from voice actors.

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Genshin Impact

Through the Mists - Octave of the Maushiro