Phoenix Soul Jewels are used to upgrade B-grade mercenaries to their hero ranks. They can been crafted.
Mercenary upgrades[]
The following mercenaries can be upgraded using Phoenix Soul Jewels:
Each mercenary can be upgraded twice using Phoenix Soul Jewels. The first upgrade can be performed at level 80 and requires 20 Phoenix Soul Jewels. The second upgrade can be performed at level 100 and requires 40 Phoenix Soul Jewels.
Crafting[]
| Level | Item | Required Items | Workload | Exp Gain/Batch |
|---|---|---|---|---|
| 38 |  Phoenix Soul Jewel x 5
|
[Phoenix Soul Crystal]×10 [Hero's Blood]×15 [Energy of Hail]×15 [Sea Element]×50 [Mysterious Vial: Wisdom]×5 |
3,500,000 | 70,000 |