Flipsphere

A Flipsphere フリップスフィア (Flisphere) is basically an ultimate attack used by the main Heroines of Ar tonelico Qoga: Knell of Ar Ciel, and consists of basically superimposing a section of their Cosmospheres over the real world, which allows them to attack the enemies by bombarding them with anything their imagination comes up.

Technical Explanation
Once a Reyvateil has Purged far enough, the U-Wave link she has with the Wills of the Ar Ciel will have grown strong enough to allow the Wills to exhibit their full power, which allows the Reyvateil to send large batches of Dynamic H-Waves, containing mostly the information that structures their Cosmospheres, to the Song Servers. Then, the Song Server will convert them into Dynamic D-Waves using the EXEC_FLIP Song Magic protocol present in the SH Server of the Tower of Harvestasha, and partially manifest the Cosmosphere of said Reyvateil in the real world.

Disadvantages
Since using a Flipsphere has Purging as a prerequisite, the same disadvantages as it apply: it's extremely embarrassing for the Reyvateil, since not only she has to shed almost all her clothes, the Flipsphere can't be triggered if her partner hasn't traveled far enough through her Cosmosphere.

Likewise, only Reyvateils that have been directly connected to the Wills of Ar Ciel through the Antibody that Archia captured can use this technique. In other words: only Saki, Finnel and Tyria can make use of it.

Conditions for Being Executed
Once the player has cleared the Lv. 3 Cosmosphere of the Reyvateil, and seen the Flipsphere tutorial at the beginning of Phase, Flipsphere will be able to be executed, but only for those Reyvateils whose Lv. 3 Cosmospheres have been cleared.

The execution for the Flipsphere is simple: the player only has to make the Reyvateil purge four times, or execute a Quadruple Purge. Once this happens, a short movie with a song will play, and the Harmograph will be emptied, being filled only with a few bars that move through it according to the song's rhythm. At this point, the player has to press the X Button whenever one of these bars is passing through the line on the left side of the Harmograph. If the player does it succesfully, the number of hits and the damage caused by the Flipsphere will be increased, but if he/she fails at doing so, the Flipsphere will weaken and deliver a lesser number of hits.

The maximum number of hits that can be delivered is of 16, which includes a variable number from 1 to 15 attacks, and a finisher.

Flipsphere is one of the most powerful attacks the player characters have at their disposal, and as such is a great help during particularly hard boss battles, such as the Battle of Destiny.

Note: Tyria is free from requirements, since she is able of executing the Flipsphere as soon as she joins.

List of Flipspheres
Saki: 

Items dropped: Cakes. Music used: An Special Story

Sarapatra: 

Items dropped: Hearts. Music used: An Alluring Kiss

Filament: 

Items dropped: Cats. Music used: Scars

Sakia Lumei: 

Items dropped: Swords. Music used: Flash

Finnel: 

Items dropped: Stars. Music used: Hole in the Dancing Star Formation

Yurisica: 

Items dropped: Injections. Music used: An Intelligent Choice

Soma: 

Items dropped: Pumpkins. Music used: Floral Threat

Suzunomia: 

Items dropped: Words. Music used: An Elegant Song

Tyria: 

Items dropped: Energy Beams (Ar tonelico Song Magic). Music used: Links

Ar Ru: 

Items dropped: Meteors. Music used: Crimson Impulse