- Eteral Spiral unlocks at Level 50. 

- Your goal is to eliminate the Tower Guard in each stage and climb as high as you can. A new stage will be unlocked when the previous is cleared. 

- After a stage is cleared, Runestones will be rewarded via prize draw. 

- The higher the Spire level, the stronger the enemies will be and the better the reward you will reap. All the stages of a level must be cleared before the level can be blitzed.

Rune Shop 

Lvl. 1 to 6 Rune-leveling items can be purchased for Runestones in the Rune Shop. They are required for upgrading Runes to the specific rank. 

With constant updates and optimization, discrepancies may exist between this information and in-game information. The in-game version shall prevail.