Lusia

The Krogan Rebellions began in the asari colony of Lusia. After centuries of unabated expansion, the krogan finally forced the Council's hand when they tried to annex this world. Aware that in a generation, Lusia could be a staging base for an invasion of Thessia, the Council came to the colony's defense. They cut the krogan supply lines off at Thessia's mass relay and inflicted heavy casualties. The krogan here surrendered, but others across the galaxy were enraged. Lusia became the catalyst for a much greater war.

More than a millennium later, Lusia finds itself once again in danger. Throughout the war, the colony's webbed defense grid remained at least partially functional. That was, until the battle of the Citadel was lost.

While comm traffic is rare, it is still something that can be found on other reaper-devastated worlds, with survivors trying to get together and fight back. This was not the case with Lusia. The planet had above average reaper presence, and since the Battle of the Citadel, comm traffic from the major colonies was completely dead. It was obvious that the reapers are hiding something there.

During RIFT's third mission, it was finally revealed what was happening on Lusia. The reapers had been harvesting biotics and using them as a genetic template for a prototype reaper biotic. The prototype, dubbed "The Sybil" or "The devil" was later destroyed by the fireteam after they detonated the X-5 charges that had been planted within.