The most important resource in the game.

Most effective usage:

• Arrival Summon
• Spicy Summon
• Fast Battle
• Daily Trial
• Rune Reforge
• Genesis Refinement
• Coin Purchase
• Dice Purchase
• Artifact conversion

How to Acquire Gems

• Idle Battle
• Guild Trial
• Prioritize Gem Expeditions B and above
• Luck Prayer
  • 1000
• Weekly Mission
• Gem Weekly Pass
• Gem Event Pass