You can obtain jewels of various types as a reward for fighting Assailants and Alpha Assailants. The higher the type, the bigger the bonus provided when equipment is enhanced with the jewel.

Types of jewels:

• Simple
• Usual
• Unusual
• Rare
• Epic
• Legendary

Legendary jewels have additional upgrade levels:

• Legendary I
• Legendary II
• Legendary III

There are also Adomi jewels – these give four bonuses.