The Schwarzstrom(シュヴァルツ・シュトローム, Shuvarutsu Shutoroomu, "black storm") is a group of fictional characters within the Soul series of games. It consists of Nightmare, Astaroth, Aeon Calcos the Lizardman, and formerly Ivy.
In the New Timeline, Astaroth, Aeon, and Ivy were more commonly referred to as the "Covenant Shield". According the Literature section, the Covenant Shield uses Frederick's image as a symbol of reverence. In addition, Nightmare gave himself and his allies positions and titles befitting their image. Believing his father's soul is still communicating with him, he gave him one as well.
- "Fredrick Schtauffen": Chief Gules (The First Red)
- Nightmare: Honour Azules (Glorious Blue)
- Ivy: Dexter Purpure (Fortuitous Amethyst)
- Astaroth: Sinister Sable (Dire Black)
- Lizardman Chief: Base Vert (Vile Emerald)
- The group's name has an error in it, as "storm" would translate to "Sturm" in German, whereas the German "Strom" is equivalent to "stream". However, the Japanese translation of the name (黒い嵐 "Black Storm") indicates that it is supposed to be "Sturm" rather than "Strom".
- It can be considered as an evil counterpart of Siegfried’s Schwarzwind.