The Mnemosyne Super MAC Event occurred over 37 million years before the current date. The Reapers realized how close the Weesht were getting to breaking the cycle so they tracked down and destroyed the Weesht version of the crucible. Knowing their cycle is lost the Weesht use remains of the failed crucible and make a heavy artillery cannon which struck Precursor, the Reaperfied version of the Gigachads eliminated from existence over 200,000 years before the Weesht. Upon being struck the capital ship fired its Laser at the dying race obliterating them. Precursor knowing repairs not possible shuts down most systems and uses itself as a mobile indoctrination device for future cycles. Precursor was given some updates to its indoctrination emitter before going dormant at the end of the Weesht cycle end to avoid accidental indoctrination before proper cycle end.
Damage Report (translated from Weesht)[]
1T ~3.0524 hours
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T-0 beam hits precursor 1.8kms up its body.
T-01 beam penetrates kinetic Barriers smashing through hull
T-03 Beam strikes propulsion engine crippling motion.
T-1 internal sensors lock on to Weesht cruisers.
T-10 all cruisers destroyed
T-2 malfunctions detected throughout systems.
T-3 isolating damage repairs deemed impossible
T-4 Harbinger notified
T-6 Harbinger arrives with indoctrination emitter updates.
T-100,000 Weesht cycle complete hybernating
First destruction Attempt[]
During the Arthenn-Reaper war the Arthennian high command noted the high rate of desertions across their military forces. They sent a fleet to try to take the already destroyed Reaper into the failed star but when they get close to the ship they were attacked by indoctrinated forces. The few that made it onto Precursor ended up getting mauled by Zeioph collectors and Arthennian Husks. The final few were sent to the collector base to be formed into the Reaper Repentant, the vanguard of the Prothean cycle. No other attempt was made to destroy the indoctrinator until the successful 2185 destruction