Infel Phira (インフェル・ピラ, Inferu Pira?), romanized as Infel Pira in the official localization, is a large sphere-shaped artifact that can be seen floating in the skies above the Second Tower of Ar tonelico. It was created 400 years prior to the events of Ar tonelico II: Melody of Metafalica as a step towards creating Metafalica, and currently serves as the Song Server for the IPD Reyvateils. Its name means "Seed of Love" in the Hymmnos Language.
Compared to Ar tonelico, Infel Phira's power output appears laughably small: it is a measly 0.1% of what Ar tonelico is capable of outputting. Despite this, the Infel Phira Dependent (IPD) Reyvateils, the Reyvateils whose Cosmospheres are hosted on Infel Phira, can sing faster and more effectively than any other kind of Reyvateil.
This is thanks to a dialect of Hymmnos that was developed specifically for use with Infel Phira: the New Testament of Pastalie. This dialect is much closer to actual machine code, which makes it many times faster to process than Central Standard Note. What the Song Server lacks in raw power, it makes up for with sheer throughput.
Another defining feature of Infel Phira is its ability to accomplish different tasks by changing its Mode. A Mode Change causes the Song Server to reconfigure itself into a new appearance in accordance with that task. The switch can only be initiated by Infel Phira's Administrator: the Queen, also known as the Maiden of Mio. The ultimate goal of this Mode-switching is to put Infel Phira into Metafalica Mode, where it can sustain a Heart of the Land.
Some of the Modes make use of the fact that IPD Reyvateils are connected to each other at the 8th and 9th levels of their Cosmospheres. Replekia Mode, for example, uses this connection to channel extra power to Infel Phira for use as a devestating energy weapon. Messela Mode, on the other hand, forces all of the IPDs to act as one.
The history of Infel Phira began little after Jaza's theories were discovered and deciphered by a radical political faction of Metafalss. Given that the creation of Metafalica required the sacrifice of a Reyvateil to be completed, according to what Jaza had researched, the people abandoned the radicals, which, wanting to regain their support, began searching for a method that would allow them to try and create the paradise everyone yearned for without sacrificing anyone.
The method found was creating something that could be used as a substitute for the sacrifice that Jaza's EXEC_METAFALICA/. needed to accomplish its functions, and so, the Infel Phira Project was born. This version of Infel Phira was supposed to be only a mechanism for creating the land, so unlike the version that was built later on, this one didn't have any Song Server capabilities, and was entirely dependent on Sol Marta (and by extension, on the First Tower of Ar tonelico). However, all the initial attempts at building it never passed the First Stage, and ended in utter failure. Due to this, the Grand Bell decided to forget about this project, and leave it to fade away from history.
Then, a certain day, in 3258 AD, the Grand Bell made the announcement that the project would be restarted, thanks to a very special fact: a scientist, Dr. Grammul, was hired by them, because of the acceptation his Super Reyvateil Theory had gained among the general public. In there, it was suggested that Infel Phira should be a completely independent system from the First Tower, and use the Reyvateils that would be linked to it (the IPDs) as its main power source. And with that alone not being enough, Grammul also proposed to combine the powers of all the IPDs singing together into a single consciousness and a single song, which would be what would allow to fulfill the extremely high requirements for waveflow and spectrum required for EXEC_METAFALICA/., and to avoid sacrificing anyone.
However, the last part, the one about voiding the need for sacrifices, ended being a lie, since the IPD that would end up being the Administrator for Infel Phira (who is currently known by the title of Maiden of Mio) would end up being transmigrated into a Heart of the Land, and into the basis for the land. However, this part was never shown to the public, and due to it, the Grand Bell assembled a team of outstanding engineers: Team Lakra, and after seven long years, the First Stage of Infel Phira was completed successfully.
The First IPD
The concept of the IPD Reyvateils naturally came together with the development of a separate Song Server from Ar tonelico, so they were created in parallel to Infel Phira's construction. So after many failed experiments and continued research, finally, the very first IPD, Infel, was transcribed to Infel Phira in 3291 AD. Once this experiment turned out to be successful, the Spectrum Gene that was used for Infel was implanted into other unborn Reyvateil gene-carrying girls, making it possible to change the server in which they depended from Ar tonelico to Infel Phira, and creating the IPD subclass of Reyvateils.
Thanks to this, the Grand Bell established that from that time onwards, there would be a second Maiden that would rule Metafalss, the Maiden of Mio, while the Maiden that already existed since nearly 300 years ago would be called the Maiden of Homura.
However, this atmosphere filled with happiness wouldn't last for very long: a few years later, the fact that Metafalica would still need sacrifices to become a reality was leaked to the general public, and all of the support that Grammul had gathered went away in less than one day. Not only that, Infel had already found and corrected all of the flaws that Grammul's theory had, discovering the existence of the Selfstabilizing Tesseractal Nuclear Loops, and based the new theory for creating Metafalica in this. Due to both of these facts, and his old age, Grammul was fired from the project, and Infel was appointed as the new head of the Metafalica and Infel Phira Projects.
After obtaining the leadership of the Infel Phira Project, and creating successfully the Heart of the Land known as Metafalica-Alpha, she and her team began programming the Hymmnos dialect that would be exclusively used by Infel Phira: the New Testament of Pastalie. It was designed to take advantage of Infel Phira's lower instruction count and higher execution timing, allowing the IPDs to sing much faster and with a more powerful range of effect than the Reyvateils on Ar tonelico or Harvestasya would be able to attain. However, this doesn't mean that the other Hymmnos dialects wouldn't work in it, given that Infel Phira was also built with an emulation layer for every single Hymmnos word registered in Ar tonelico's Hymmno Server, allowing the IPDs to sing in any dialect they wish, but getting the best efficiency and power output from singing in New Testament of Pastalie.
Infel Phira's Completion
After all of the structural and programming work in Infel Phira was completed, Infel dedicated herself to streamline all of the processes necessary for creating Metafalica into a single song: METHOD_METAFALICA/.. This was the final difference between the theories that she and Grammul had established: instead of sacrificing the singer and turning her into a Heart of the Land, Infel's theory made it possible to create a Heart of the Land out from the combined singing of all the IPDs connected to Infel Phira, which would then be used by EXEC_METAFALICA/. to create the land.
On 3310, after much time of effort and investigation, Infel finished crafting and programming the Song, thus leading the Infel Phira Project to a successful end. However, the history wouldn't end here...
The War Against the Goddess
Since when Infel and Nenesha tried singing Metafalica together, both Infel herself and the people committed the error of closing their hearts to each other, thus rendering METHOD_METAFALICA/. completely useless and forcing Nenesha to extract power from Frelia to be able to sing EXEC_METAFALICA/. to the end. Due to this, Raki descended from Sol Marta and killed Nenesha to regain the D-Cellophane, which also led Infel to declare war to the Goddess, and mobilized all of the IPDs to try and capture Frelia.
Infel Phira became an instrumental weapon for the Metafalssians during the period, given the huge amount of power that the Replekia Mode could release. Without this power, the Metafalssians would never be able to defeat the Divine Army. However, Raki was aware of this fact, and while she never could destroy it, the Divine Armies under her command inflicted a great damage on the Song Server, killing many IPDs due to the memory sectors where their Cosmospheres resided being destroyed, and destroying the emotional limiter that Infel Phira was equipped with.
After the War, it was agreed that Infel Phira would be shut down, and all of the data it contained would be erased, as per the conditions in the Hibernation Pact described. Infel Phira would stop being a Song Server, and become a lodging for the souls of the people of Metafalss once EXEC_HIBERNATION/. would be sung.
While Ar tonelico has a dedicated power source, Infel Phira lacks one; it is instead powered by the IPD Reyvateils connected to it. At all times, a portion of every IPD's Dynamic H-Waves are converted into Dynamic D-Waves and stored within Infel Phira's Symphonic Power battery. Because of the large number of living IPDs, the battery can be charged within a short period of time.
When an IPD sings Song Magic, they expend the Symphonic Power within Infel Phira's battery. To prevent the battery from draining completely, the amount of Dynamic H-Waves taken from the IPDs increases to compensate for the power being used. Additionally, Infel Phira contains a security measure that limits how many IPDs may sing Song Magic at any given time.
These are the forms that Infel Phira can take at the command of the Queen, also known as the Maiden of Mio.
Sarre Mode, also known as Normal Mode or Individual Consciousness Mode, is the form that Infel Phira takes while it is not receiving instructions from the Queen. While in this Mode, it functions similarly to Ar tonelico, hosting the IPDs as individual Reyvateils and allowing them to sing Song Magic.
In Replekia Mode, the E-Spots of the IPDs are opened, allowing them to share their Dynamic H-Waves with the other IPDs while keeping their Soulspaces separated. This is used to amplify the power of a Song Magic. The amplification is proportional to the number of IPDs that chose to accept the opening of their E-Spot.
To initiate Replekia Mode, the Queen must sing the Hymmnos Extract METHOD_REPLEKIA/..
Metafalica (Tornekia) Mode
Metafalica Mode, also known as Shared Consciousness Mode and originally called Tornekia Mode, is the end goal of Infel Phira's Mode-switching capabilities. While in this Mode, the Soulspaces of the IPDs are fully connected so that they may share their feelings freely, and in doing so, lay the foundations for a Heart of the Land.
Infel Phira has taken this form three times during its history: Once when Infel and Nenesha attempted to sing EXEC_WITH_METHOD_METAFALICA/., once when Cloche sang METHOD_METAFALICA/. by herself, and lastly when Cloche and Luca successfully sang EXEC_WITH_METHOD_METAFALICA/..
It was originally planned that the Queen sing a Hymmnos Extract called METHOD_TORNEKIA/. in order to switch Infel Phira into Metafalica Mode; this is why it was originally referred to as Tornekia Mode. Once Infel realized that METHOD_TORNEKIA/. would not be powerful enough to create a Heart of the Land, she developed METHOD_METAFALICA/. as a patch for EXEC_METAFALICA/.. Tornekia was then changed to Metafalica in order to match the new Song's name.
Messela Mode, also known as System Control Mode, forces all of the IPDs to share the same knowledge and consciousness. This allows the Queen to orchestrate the IPDs as she sees fit, which is why Messela Mode is intended to be used only in emergency situations.
The fact that it allows the Queen to control the will and emotions of the IPDs, however, makes it a dangerous Mode to use. The Grand Bell eventually prohibited its use due to the potential violations of the rights of the IPDs.
Torcarrol Mode, also known as the Large-Scale Gathering Mode, was used to test the viability of Metafalica Mode. It connects the Soulspaces of all of the IPDs within 10 Stons of the Queen, and additionally adds them to Infel Phira's Queen registry, giving those IPDs the administrative privileges of the Queen. This Mode saw use during the War Against the Goddess, and is the cause of the Negative variant of IPD Outbreaks.
Deenelmaite Mode fuses the consciousnesses of all the living IPD Reyvateils into a single Reyvateil. This was an early attempt at fusing the feelings of the IPDs together, based on the Grammul's Reyvateil research. It had one major flaw: the fusion of the Reyvateils' Soulspaces was permanent, and even if Infel Phira returned to Sarre Mode, the IPDs would not return to their original states. This Mode was abandoned, and was virtually succeeded by Torcarrol Mode and, later, Metafalica Mode.
Bonus Explanation:The Metafalica Sphere
Because Infel Phira was designed to become the Heart of the Land itself once Metafalica is successfully created, all the data addresses within Infel Phira are defragmented and remapped to sectors that are recognized as working correctly. Since this nulls out the possibility of writing the Cosmospheres of the IPDs into bad sectors, this nullifies the IPD Outbreaks. This also deletes the backup memory banks used by METHOD_IMPLANTA/. and the data of IPDs that don't have a physical body anymore, which is why Infel disappeared upon the creation of the land. Also, after the Heart of the Land is created, it's impossible to revert Infel Phira back into Sarre Mode, and neither the Maiden of Mio can ever harness the power of Replekia again.