Time	20:00-23:00 on Dec. 8th - 21st
Rewards	Before the Elemental Altar is set up: every time you infuse Essences to the corresponding elemental stones, you will gain 1 Ocean Card and EXP worth 1 EXP Ball; After the Elemental Altar is set up: every time you infuse Essences to the corresponding elemental stones, you will gain EXP worth 1 EXP Ball. Correctly answer 3 questions raised by Delia, you will obtain the chance to play the special lottery (once a day, at most).
Level Requirement	50 or above
Frequency	Once a day
Location	Cronus and Sky Yard
Key Item	Crystal Ball Used to collect the elemental essences. Right click to use.
NPC	Orlando, Cronus (268,495); Delia, Sky Yard (83,78)

Brief Walkthrough

1. Talk to Orlando from Dec. 8th-21st, to receive a Crystal Ball.
2. Use the Crystal Ball to collect the Dawn, Twilight and Night Dusts, and then infuse them to the correct totems to gain the Earth Essence.
3. Use the Crystal Ball to purify the Polluted Water Element to gain the Water Essence. If you fail, a Toxic Spore will appear.
4. Defeat the Toxic Spore, and you have the chance to gain the Water Essence.
5. Use the Crystal Ball to protect yourself from being burnt, for 5 seconds. If you manage to knock the Flame Core 8 times within 5 seconds, you will gain the Fire Essence.
6. Pass through the storm, then get closer to the magic circle and use the Crystal Ball to gain the Air Essence.
7. Infuse the essences to the elemental stones to gain the chance of visiting Sky Yard, if the Elemental Altar is set up.
8. On Dec. 8th, when the elemental stones have been infused with enough essences, the Elemental Altar will be set up and the gate of Sky Yard will open at 20:00-23:00.
9. On Dec. 9th – 21st, once you infuse the essences to the 4 elemental stones, you can enter Sky Yard at 20:00-23:00.
10. Speak with Delia in Sky Yard (83,78). If you correctly answer 3 of her questions, you can play the special lottery! Once a day, at most.
11. Read the Steles to learn information about the Legion Eudemons.

Detailed Walkthrough

1. The ancient Alpha nation had achieved amazing advancements in both science and magic. Recently, the mages of Cronus have found the road to the relics! On Dec. 8th – 21st, once the Elemental Altar is set up, the Sky Yard Gate will open at 20:00-23:00, every day. The secrets of Legion Eudemons are about to reveal! If you're interested, go talk to Orlando for more details.

2. Only when all the 4 elemental stones have been infused with enough essences, will the Elemental Altar be set up. Orlando will give you a Crystal Ball, which is used to collect the essences.

3. You're going to collect Dawn Dust, Twilight Dust and Night Dust, with the help of the Crystal Ball.

4. Infuse the dusts to the Dawn Totem, Twilight Totem and Night Totem, correctly, and you will gain the Earth Essence!

5. Find the Polluted Water Element and use the Crystal Ball to purify it, at the right time. After that, you will obtain the Water Essence.

6. However, it's not that easy. If you fail, you will meet a Toxic Spore, which is polluting the water! Defeat it and you have chance to obtain the Water Essence!

7. Find the Flame Core in the fire area. Use the Crystal Ball to gain the protection against fire, which lasts for 5 seconds only. You'll need to knock the Flame Core 8 times before the protection disappears. After that, you will get the Fire Essence. Remember, you'll get burnt if you knock Flame Core before the protection is active or after it disappears.

8. The Air Essence can be obtained on the cliff. But before you reach there, you have to pass through a terrible storm. There's no telling where you could be transported to!

9. When collecting the Earth, Water, Air and Fire Essences, you are going to infuse them to the Earth, Water, Air and Fire Stones. You will receive 1 Ocean Card and EXP worth 1 EXP Ball!

10. When the elemental stones have been infused with enough essences, the Elemental Altar will be set up and the Sky Yard Gate will open at 20:00-23:00!

11. Only if you infused the essences to the elemental stones, will you be able to pass through the Sky Yard Gate. Even though the Elemental Altar has been set up, we still need a large amount of essences to maintain its stability. On Dec. 9th - 21st, every time you infuse the 4 essences, you will gain EXP worth 1 EXP Ball!

12. When you enter the Sky Yard, you can talk to Delia, who is studying the secrets of the Legion Eudemons. If you correctly answer 3 of her questions, you can play the special lottery! However, the chance is given once a day, at most.

13. If you look around, you will notice there are several steles. Carefully read them, because they help you give correct answers to Delia's questions!

Note: The contributions made by the Mannequin Character do not count.