Diamond
Dropped by monsters
| Monster | Type | Level |
|---|---|---|
 Enigma Temple (Bonus C) | Metin stone | 90 |
| Enigma Temple (Bonus B) | Metin stone | 105 |
| Enigma Temple (Bonus A) | Metin stone | 120 |
Golden Tri-Monster Box
Your reward when you reveal all Monster Memory Trios in less than 17 moves.
Recon Chest
You can get this from Reconnaissance merc operations.