★ Version 2.6 Phase 2 is out now!
┣ Iuno Debut: Best Build - Materials - Weapon
┣ Rerun: Ciaccona Build - Materials
┣ Main Quest: By Moon's Fated Light
┣ Area: Sanguis Plateaus - 2.6 Sonance Caskets
┗ Events: Tidal Defense Sim, Marks of the Wild

The Fallen Grave puzzle is an Encryption Block puzzle solved by lighting up all the floor panels. See how to solve the Fallen Grave puzzle, where to find it, and the rewards for completion.
List of Contents

There are a total of five Key Repeaters surrounding the Fallen Grave puzzle.
Using the image above as reference, there are two single-beam Key Repeaters (colored green), and three double-beam Key Repeaters (colored orange).

Follow the placement of the Key Repeaters as shown on the image above.
The numbering and order of the Key Repeaters does not matter. You may interchange the single-beam Key Repeaters (green), as well as the double-beam Key Repeaters (orange), as long as you follow the correct placement.

The Fallen Grave puzzle is located in the southern area of the map. Fast travel to the Resonance Beacon in Fallen Grave and head southeast to find the puzzle.

An Advanced Supply Chest is given as a reward for completing the Fallen Grave puzzle. It contains Union EXP, Astrites, Development Materials, and Shell Credits.

Beginner's Guide: Tips and Tricks
| Utilities | |
|---|---|
| All Utilities | Grappling Hook |
| Sensor | Waypoint |
| Casket Sonar | Levitator |
| Projector | Lootmapper |
| Camera | Ultrasonic Pulse Chip |
| New Flight Mechanics | - |
| Unmarked Challenges | |
|---|---|
| Unmarked Challenge Locations | How to Complete the Backflip Challenge |
| Travel in Jinzhou Gulpuff Challenge | Mingming and Doudou Hide And Seek |
Fallen Grave Puzzle Guide

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