Armageddon
From FABT
Armageddon was the reaperfied remains of the Inusannon that was deployed against the Protheans the very next cycle. It was originally planned by the reapers to vanguard the Asari cycle but it ended up being destroyed in the Prothean last stand around Joab. The wreckage was studdied by the Protheans where the Inusannon DNA was sequenced by Prothean scientists. The existence of a Inusannon reaper would have been scientifically impossible due to genetic incompatibility however the DNA of the reaper is confirmed by recovered samples to be the Inusannon. All scientists were killed however when the reapers launched their final bombardment on the planet with most if not all research lost. The bits and pieces that remained brought insight into reaper technology.