Arghena

==Unlock method==
;Pre-requisites: Unlock and read Story entries 15-6 and 16-6
Once the pre-requisite has been met, selecting Arghena will reveal four more conditions. The first three of these involve using a substitution cipher to fill in missing letters in song titles (where A = 1, B = 2, Z = 26, etc). Note that these letters must be "locked in" by viewing the Arghena conditions again after satisfying their individual condition.
The unlock conditions are as follows:
#Inscribe the name upon [?]ec[?]nicolour
#*Missing letters are based on the last recorded combo upon completing or quitting a song.
#**Required combos: 20 (T), 8 (h)
#*Play Technicolour
#Inscribe the name upon UNKNOW[?] LEVEL[?]
#*Missing letters are based on the current note speed setting, without the decimal.
#**Required note speeds: 1.4 (14 = N), 1.9 (19 = S)
#*Play UNKNOWN LEVELS
#Inscribe the name upon E[?]o E[?]m[?]
#*Missing letters are based on the level of the last song chart played (to completion or quit midway).
#**Required levels: 7 (g), 9/9+ (i)
#*Play Ego Eimi
#Select the Partner 'Maya'
Fulfilling all of the conditions will present a special Challenge Course:
*The charts for Technicolour → UNKNOWN LEVELS → Ego Eimi → Arghena must be completed in order. All charts are played on the corresponding difficulty.
*The first three songs use the Course Mode variant of the Hard Gauge, where Recollection Rate does not reset between songs, and the penalty for LOST notes is slightly greater. The starting and maximum Rate will be 100 for the first Challenge attempt.
**Reaching 0 Rate during the first three songs will cause Track Lost and end the Challenge. It will also bring up the text Irruption Lost... on the results screen.
**For the next Challenge attempt, the starting and maximum Rate will be increased by 1-100% depending on performance, capping at 999%. The current Rate cap can be viewed from song select.
***Failing Technicolour with 0 score will increase the cap by 1-2%. Failing Ego Eimi with an average score per chart over 9,000,000 will raise the cap by slightly under 100%.
*After reaching Arghena, the Gauge reverts to the default Gauge. Playing the chart to completion will unlock it permanently, regardless of Track Lost or Track Complete.
After unlocking Arghena on one difficulty, the requirement to use Maya is replaced with "Experience Arghena" on all lower difficulties, allowing the player to use any Partner to complete the Challenge.
==Experience==
Unlocks: Story 16-7, Insight
This effect is triggered when playing Arghena for the first time on each difficulty.
When experiencing this effect, the pause button and Recollection Gauge will not be visible, and the background will be animated for the entirety of the playthrough. The song name and the artist are also both marked as "???" until the second drop occurs, where the score and song details on the upper right disappear and re-appear, revealing the song name and artist. 
After the first play on a given difficulty, this effect can be re-experienced by playing the song with Maya equipped. In subsequent plays, the pause button, Recollection Gauge, song name and artist will be visible as usual. Re-experiencing the effect on an unlocked difficulty requires Testify to be unlocked. These effects are visible during offline play.
==Trivia==
*Arghena was a winning submission in Arcaea Song Contest - 3rd Movement "Imagining After".
**This song is Laur's second successful Arcaea Song Contest entry, after Seclusion.
*Arghena is the signature song of Insight, who is featured in the song jacket, along with Maya.
**The letters 'inscribed' during the unlock process of Arghena are T, H, N, S, G, I, and I, which, when rearranged, spell out Insight.
*Laur details his and Feryquitous' contributions to each part of the song here.
*Arghena displays a generic song jacket (right) prior to being unlocked.
*Arghena is the first song to be classified as an Irruption song, distinguishing it from Terminal songs and Anomaly songs.
*The chart design credits refer to the Buddhist notion of the six primary consciousnesses (vijñāna), which describe the senses through which material beings perceive the world. 
**The first three consciousnesses (第一識, 第二識, and 第三識) refer to sight consciousness, sound consciousness, and smell consciousness.
*When first added, Arghena's unlock condition required Technicolour, UNKNOWN LEVELS, and Ego Eimi to be played on the difficulty being unlocked. This was changed in v5.0.5 to allow them to be played on higher difficulties.
*The 999% maximum Rate cap for the Challenge was initially subject to a bug, where the Recollection Gauge bar would visibly not decrease upon LOST notes, while the numerical Recollection Rate indicator would, still causing a Track Lost if it reached 0. This was fixed in v5.0.5.
*Arghena is currently the hardest song in Arcaea that does not have 4-hold notes.
Category:Arcaea Original Songs
Category:Arcaea Song Contest Songs
Category:Hidden Songs