Erda Spectrum is the Arcane River Special Content located near the Vanishing Journey region. To participate, talk to Nina in Nameless Town. Erda Spectrum can be attempted in a party of 1 - 3 people, and you will have 3 clears per week, meaning that you can reattempt or reset a run that you've already entered. Erda Spectrum has a recommended Arcane Power of 60.
Nina has set up an Erda Collector to conduct research on the Erda in the Vanishing Journey, and needs your help gathering Erda.
Within the Land of Oblivion[]
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| Within the Land of Oblivion |
For the first stage, the Erda Collector will be in the center of the map. Happy, Raging, Sad, and Joyful Erdas will spawn, and each Erda defeated will charge the Collector by 1. Occasionally, a blue bubble will appear and burst, charging the Collector by 10 if you are standing in it. Pressing the NPC Chat / Harvest key near the Erda Collector will activate it, with its active duration based on how much Erda has been charged; every charge will give it 1 second, and it can be reactivated when the timer runs out. Once it is charged, it will shift between blue, red, and purple, and attacking it will produce Erda Clusters based on its current color.
On the left and right side will be a red field and a blue field (at random), and the Erda Clusters must be pushed to the same color side by pressing the NPC Chat / Harvest key near them. Occasionally, a puddle will appear and burst on the ground, destroying any Erda Clusters above. To pass this stage, you must obtain a total of 10 points by doing this; red and blue will give 1 point each, and purple will give 2 points. Upon completing this stage, you will be teleported to the next stage.
Within the Land of Tranquility[]
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| Within the Land of Tranquility |
For this stage, Arma's Followers will spawn normally, and two Arma Jrs will spawn from the caves on the sides of the map, slowly moving toward the center. If they successfully reach the center, you will be kicked out and fail the run. Like the previous stages, every one of Arma's Followers you defeat will charge the Erda Condenser by 1, and pressing the NPC Chat / Harvest key near it will fire a laser that can be held down to push each Arma Jr all the way back into the cave; do this 5 times in order to complete this stage and be taken to the Reward Stage.
Reward Stage[]
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| Temporary Investigation Base |
This stage serves to give your rewards. If you successfully complete Erda Spectrum, you will obtain EXP and 
Arcane Symbol: Vanishing Journey. If you fail, you will be given no rewards, but the run will not count toward your weekly completions.
Rewards[]
Upon completing Erda Spectrum, you will receive Arcane Symbol: Vanishing Journey x 15 in the form of usable vouchers. Additionally, you can choose to receive 187,726,220 EXP, up to 3 times per week per world.
You can also immediately complete weekly runs for every additional area you complete in Arcane River.
- When Chu Chu Island is completed, you will be able to immediately complete 1 run to receive the Symbols instantly.
- When Lachelein is completed, you will be able to immediately complete 2 runs to receive the Symbols instantly.
- Note that the EXP reward will NOT be given if you choose to immediately complete the run.
Availability of Erda Spectrum
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| Party Quests and Dungeons | ||
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| Normal Party Quests | ||
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| Cross World Party Quests | ||
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| Exclusive |  Wood Theme Park*
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| Arcane River Special Content | ||
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| Ranked | ||
| Exclusive | ||
