Official Sound



35% accumulation

For general information, see Anomaly.

Trigger Time: 1:26

Unlocks: Fracture Ray

To trigger the anomaly, the following requirements have to be fulfilled:

  1. Hikari (Zero) is the selected Partner.
  2. Hikari (Zero)'s skill is sealed.
  3. (Future only) Hikari (Zero) is Level 4 or higher.
  4. The necessary Recollection Rate (see section below) is attained at the trigger time.

Upon meeting the above requirements, the anomaly occurs, but the song does not transition to Fracture Ray yet. From this point until the end of the song:

  • HARD Recollection Rate is used.
  • The PAUSE Button is disabled, forcing you to complete the remaining song.
  • Recollection Rate decreases 1-3% every 2 seconds and upon every LOST note.
  • The map fades out gradually, and the visibility is reduced when the Recollection Gauge becomes lower.
    • Upon reaching 5% Recollection Rate, the Recollection Gauge is no longer visible.
  • Having Recollection Rate drop to 0% does not immediately cause a Track Lost, but a LOST note after will.
    • When the track is lost, the map turns pure white before viewing the Result. The Track Lost sound effect won't be heard, and the song quickly fades out.

If successful, the song transitions into a programmed glitch section, all notes in this section will score 0 without the bonus score, and recollection rate increases 10 per second (although 0 recollection rate will still fail the anomaly). Upon reaching the end, the song transitions to Fracture Ray, under HARD Recollection Rate and the same difficulty as before in Ether Strike. At this point:

  • If the track is completed, the song and chart for the respective difficulty is unlocked.
  • If the track is lost, you would progress a certain percentage towards unlocking it (depending on score and difficulty). When this number reaches 100%, the song and chart for the respective difficulty is unlocked.

Recollection Rate Requirement (Future)

Hikari (Zero)'s Level Recollection Rate
Anomaly No Anomaly Possible Requirement
4 100% (NO LOST)
5 98% 97% 98%
6 90% - 95% 89% 90%
7 90% 89% 90%
8 86% 85% 86%
9 83% 80% 82%
10 72% 65% 70%
11 68% 63% 65%
12 60-62% 60% 61%
13 59% 56% 57%
14 57% 53% 55%?

Recollection Rate Requirement (Present)

Hikari (Zero)'s Level Recollection Rate
Anomaly No Anomaly Possible Requirement
1 98% (ALL PURE) 97% 98% (ALL PURE)
2 98% (ALL PURE) 97% 98% (ALL PURE)
3 95% 90% 91% - 94%
4 93% 90% 92%
6 90% 89% 90%
7 85% 80% 83%-84%

Recollection Rate Requirement (Past)

The requirement is to have no LOST notes until the anomaly time.

Percentage Gain (Anomaly Lost)

  • Past: 10% - 35%
  • Present: 5% - 25%
  • Future 5% - 15%



  • During the first two repetitive "Earth" vocal samples, use your left hand for half the notes and the right hand for the other half.
    • As holding early for arc notes still register, you can hold after the last note as it is where the arc note will appear.
  • After the second repetitive "Earth" vocal sample, remember that the blue arc note is moving down. Also remember that the red arc note that follows also moves down slowly.
  • At around 1:55 in the song, remember the pattern for one sky+ground note simultaneously, one sky note, and two ground notes.


Link Player Score Sounds
YouTube higllus 10,001,170 (MAX) Finger taps
YouTube Ritxman 10,001,138 Fingernail taps
YouTube Daga 10,001,128 None
YouTube Asam1ya 10,001,103 Finger taps


  • Prior to version 2.0.0, the individual difficulties had corresponding story logs, which were relocated to Story:
  • Ether Strike, along with Fracture Ray, were made specifically for Arcaea. Unlike Axium Crisis and Grievous Lady, the songs' titles were not named after the artists or any person related to them.
  • This song has the longest section requiring more than 2 fingers, lasting for about 23 seconds (60 beats at 156 BPM).
  • In this song, the vocal samples says "An intense dissatisfaction of the world", "And a compulsion to do something about it", "Heaven and the earth", then "My guiding star" in two rounds in this group.
  • The song title is actually a reference to a character's attack from Valkyrie Profile. The proof is seen in Akira Complex's comment thread here
  • Ether Strike FTR is considered by most to be easier than Halcyon FTR, which is required to unlock the chart.
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