Step 1: Get 4 dvalin relics or join a friend who does
Step 2: Complete the first firewall quest on earth to receive a transceiver.
Step 3: Put in the 4 passwords. (Go into the pause menu; inventory; mission items hover over and press y/triangle)
121122212
12112211
1222122211
12121211
1=top
2=bottom
This will unlock another quest where you are timed and have to kill 3 wizards at the end to receive a core.
Credit to Kubysz for telling me the last 2 codes
Step 4: Complete the new quest shadow fall on Earth
Step 5: The core will need to be repaired to do so you need to get 5 parts
1: Complete the archive mission on Venus (Can be done on easy or hard)
2: Break any legendary/exotic heavy weapon
3: Complete a warsat public event on Earth
4: Complete another on the Moon
5: Finally complete one on Mars
Step 6: If you haven't placed the parts in the core do so now.
Step 7: Return the core to Banshee
Step 8: Wait until banshee gives you a quest
Step 9: Go do saber 2 strike on 280 light
Step 10: Sleeper frame get deliver to banshee
Step 11: Sleeper get