"The Hive are a constant threat to Mars and to humanity, and Rasputin wants to do his part. Bring the Hive to him, and he'll gather all the information he needs to help us keep the planet safe.
To that end… Would you care to pick a fight?"
Successfully complete the final wave of Escalation Protocol and open the final chest using a fully charged Encrypted Cache Key.
Rasputin Key Fragments drop occasionally during Nightfall strikes. Collect 7 Key Fragments and trade them to Ana Bray for an Encrypted Cache Key. Charge your Cache Key by completing rounds of Escalation Protocol.