Soul Jewel of the Lake is an item of type Crystal that is used to upgrade mercenaries Dark King Arthur and Sage King Arthur.
| Level | Item | Required Items | Workload | Exp Gain/Batch |
|---|---|---|---|---|
| 55 |  Soul Jewel of the Lake x 5
|
[Dragon Soul Jewel]×10 [Giant Soul Jewel]×10 [Phoenix Soul Jewel]×10 [Redemption Soul Jewel]×10 [Mysterious Vial: Wisdom]×50 [Barrier Fragment of the Lake]×50 |
30,000,000 | 600,000 |