At the call of Tara the Destroyer a host of Hollow gathered outside of Cairo, Egypt with the intention of tearing it down as much as possible. These Hollow, unlike the regular hollow that were sent to attack Bogota, were much lighter and faster to compensate for the environment not being suited for heavier hollow, sand was a pain after all, and like a swarm of locusts they marched into the city and began their frenzied savagery. This group had only one leader unlike Bogota's army and it was because it was a powerful yet still loyal Vasto Lorde that saw Arngrim as fit to rule.
This group was definitely different from the others, Fear was not used on them as it was on the others. This group was so insanely loyal to Arngrim and his top commanders, The Espada, that they would willing lay down their lives for anything these people wished for. This made them more dangerous than even the Suicide Corp as they would fight just as hard, but with every intention of staying alive to seek praise from their "Gods".