Castle in the Sky is an Odyssey Event, and the fifteenth in the series. It started on August 15, 2013 at 8:00 PM (PST), and ends on August 20, 2013 at 7:59 PM (PST).
Story
?
Chapters/quests
| Chapter | Quest | Energy | EXP | Coin | Boss |
| 1: Doubled-Edge Revenge | 1-5 | -1 | +2 | +20~24 | Night Dancing Goblin |
| 2: | 6-10 | -1 | +2 | +20~24 | |
| 3: | 11-15 | -1 | +2 | +20~24 | (Blackblade) Night Dancing Goblin |
| 4: | 16-20 | -1 | +2 | +20~24 | |
| 5: Guardian Beast of the Sky | 21-25 | -1 | +2 | +20~24 | Soldier of the Solemn Skies |
| 6: | 26-30 | -2 | +3 | +40~48 | |
| 7: | 31-35 | -2 | +3 | +40~48 | (Land) Soldier of the Solemn Skies |
| 8: | 36-40 | -3 | +4 | +60~72 | |
| 9: Creation Goddess | 41-45 | -3 | +4 | +60~72 | Stellar Sorceress Axelina |
| 10: | 46-50 | -3 | +4 | +60~72 | (Meteor) Stellar Sorceress Axelina |
| 11: The Stormbringer | 51-55 | -3 | +3 | +60~72 | Cloud Dweller Balthasar |
| 12: | 56-60 | -4 | +4 | +80~96 | |
| 13: | 61-65 | -4 | +4 | +80~96 | (Hail) Cloud Dweller Balthasar |
| 14: | 66-70 | -5 | +5 | +100~120 | |
| 15: Mistake Creation | 71-75 | -5 | +5 | +100~120 | Lamenting Demon |
| 16: | 76-80 | -5 | +5 | +100~120 | |
| 17: | 81-85 | -6 | +6 | +120~144 | (Disadvantage) Lamenting Demon |
| 18: | 86-90 | -7 | +7 | +140~168 | |
| 19: Meeting the King | 91-95 | -8 | +8 | +160~192 | Sky Tower King Kyosti |
| 20: | 96-100 | -9 | +9 | +180~216 | (Authority) Sky Tower King Kyosti |
| 100+ | -10 | +10 | +180~360 |