It was the height of day on Arcadia when they attacked. Heroes were in short supply. With the Master Chief gone, Shadow missing, and not even so much as a Chaos Emerald on hand, things looked really bad.
But since when have we needed gems of power or an "ultimate lifeform"...?
The Black ARM aliens had been to Earth many times before, over 600 years ago being the most recent time. Their leader, Black Doom, was destroyed by Shadow the Hedgehog, who, along with the Chaos Emeralds, went missing 200 years ago (give or take), before the first Covenant attack. The Covenant threat has ended, but they were nothing compared to these guys...
By @Akamia
