Nostoi Region Hydroculus Locations and Route Guide
This page is for Oculi in the Nostoi region of Fontaine in Genshin Impact. Here you can find information on how to collect all 9 Oculi throughout Petrichor and the Faded Castle.
Petrichor Hydroculus Guide
This route takes you to collect all 3 Hydroculus in the town of Petrichor. Given there are only 3, this only takes around 1m.
Any character with exploration passives like Wanderer, Yelan, Sayu and Xianyun are suitable here.
Screenshots of all Locations
#1 On top of house
#2 Hidden behind tree
#3 On top of mountain
Faded Castle Oculus
This route takes you to collect all 6 Hydroculus in the Faded Castle. This takes around 4m. Some of these do require Lost Grimoires which can be obtained by using the new gadget on floating books inside of the Faded Castle.
Tap the gadget to stun the book. Hold the gadget to open the door.
This underground map consists of multiple layers with Oculus on 3 different floors.
Screenshots of all Locations
#1 Take a right from the teleport. Use the new gadget to collect the book to open the door.
#2 Underwater
#3 On top of pipes, glide down from teleport point.
Go to the Library to get to #4
On the top floor of the Library, hit the blue crystal to start the staircase.
Hit the blue crystal to get higher.
#4 Inside the Door. Lost Grimoire is in front of door.
#5 High up on the ledge.
#6 Behind the boss fight.
Changelog
- 24 Apr. 2024: Guide added.
Written by SoraHoshina, a gacha game guide writer with experience across multiple titles, covering both early progression and endgame content. With hands-on experience across a wide range of characters and builds, she shares practical strategies for tackling challenging content. She also shares gameplay and showcases on YouTube and Twitch (@sorahoshina).