- Class Advancement.
- Low runestone has reached lv. 10.
- Upgrade consumes 10 Mystery Runestones.
- Only following items can be upgraded to advanced runes: Brutality Rune, Blood Rune, and Recovery Rune.
Advanced Runes Upgrade
- You can tap Engulf on the rune icon to upgrade them, just as you do with Low runes.
- Upgrade of advanced runestones cost Mystery Runestones. Only available Mystery Runestones will be displayed on the right side in the upgrade screen.
- An advanced rune can engulf 1,000 runestones every day.
Mystery Runestones are dropped from bosses on the Soul Island. Soul Island boss reward has increased as follows:
Rank 1: Mystery Runestone*25
Rank 2: Mystery Runestone*20
Rank 3: Mystery Runestone*15
Rank 4-10: Mystery Runestone*10
Rank 11-200: Mystery Runestone*5