Divine Classes are the top-tier certifications in Fire Emblem: Fortune’s Weave, and reaching them means gathering five Keys of the Diadem. Each key is hidden inside a fixed treasure chest in one of Part 3’s refreshed dungeons, and each one opens a sealed chamber in the Temple of the Diadem that holds the unique item a Divine Class exam requires.
Quick answer: All five Keys of the Diadem sit in fixed Part 3 dungeon chests — Heretics’ Cave, Cougar Woodlands, Sand-Shadow Fort, Enno Isle, and Giant’s-Print Fort.
The details below reveal story content from Part 3.
When the keys appear and when the Temple opens
You can start collecting the keys well before you can spend them. Part 3 dungeons gain new enemies and new treasure chests at the start of the Second Section, and all five keys live inside those new fixed chests. Grab them whenever you have time to clear the dungeons.
Access to the Temple of the Diadem comes later. It opens automatically during Free Time as soon as the battle against Shenlo ends, in Part 3’s Salvation’s Fourth Section, titled The Hopes of Monarchs and of People. No side quest is required. At the start of the Fourth Section, the Temple appears on the World Map, so gathering every key beforehand allows you to claim all the Divine items as soon as it unlocks.
All five Key of the Diadem locations
The five keys are spread across five regions. Each dungeon holds one Key of the Diadem in a fixed chest, so the contents never change between playthroughs.
| Dungeon | Region | Chest location |
|---|---|---|
| Heretics’ Cave | Thaleia | Far east area of the dungeon |
| Cougar Woodlands | Braxithea | Follow the lake to its end, then go right |
| Sand-Shadow Fort | Nysiades | Up the stairs, then the southeast stairs; left of the square structure |
| Enno Isle | Danann Sea | The final opening at the end of the path |
| Giant’s-Print Fort | Ogmios | Topmost level of the ruins, right of the rest stop |
Sand-Shadow Fort always contains a Giant, so it is also a reliable stop if you need Giant’s Meat while you are collecting its key.
Which chamber each key opens
Every key unlocks one chamber inside the Temple of the Diadem, and each chamber conceals one or two chests. Those chests hold the Divine License items tied to specific Divine Classes.
| Chamber | Item | Divine Class |
|---|---|---|
| The Chamber of Sirius | Divinium Saddle | The Cavalier |
| The Chamber of Distortion | Crystal of Darkness | The Calamity |
| The Chamber of Distortion | Demonic Swordguard | The Blade |
| The Disciples’ Chambers | Trident | The Trident |
| The Disciples’ Chambers | Emperor’s Sash | The Godhand |
| The Prophet’s Chambers | Lotus of Reincarnation | The Avatar |
| The Prophet’s Chambers | Scales of Judgement | The Eternal |
| The Maiden’s Chambers | Muses’ Necklace | The Apsara |
How to turn a Divine item into a class change
Picking up an item from a chamber does not reclass a unit on its own. Instead, it lets a compatible unit take that Divine Class’s certification exam. You still need to meet the class’s weapon-proficiency requirements and pass the exam with a 100-percent pass rate.
You will know a chamber is cleared when its chest is opened and the Divine License item enters your inventory, and you will know the reclass worked when the unit successfully completes the exam and takes on the new Divine Class. Collect all five keys before the Fourth Section begins, and you can walk every chamber and secure each certification item in a single visit.
