The following information can also be found via descriptions of the Aragami found in the NORN Terminal's database.
God Eater 3
A Havakiri that looks as if it has clad itself in ebony armor. The cracks running along its body are thought to be caused by its massive energy. There are reports that the Havakiri evolved by devouring a large number of Spark element Aragami, but it is unknown whether this is true. The leading view is that an external factor such as a natural disaster caused mutation. In terms of both attack power and mobility, it greatly surpasses the normal Havakiri. Its sharp, unexpected slash attacks resemble lightning strikes.
-Summary of Activated Abilities
Breakable Bonds: Head/Arm Blades/Booster
Ameno Havakiri was added in patch 1.30