User blog comment:4Ferelden/A new interpretation of Starchild's motivation./@comment-5008642-20120705231406

Eh...... to be technical the Catalyst said that it's creators had created him for the exact purpose to end the conflict by harvesting and "Ascending" advanced races, Synthetic and Organic, into Reapers, who are the embodiment of Synthesis. The Catalyst harvested it's creators into the first "Pure" Reaper.