[b]Step 1:[/b] The quest "The first firewall is now available for everyone that got the four fusion rifle relics. Once you return to the gunsmith you'll get the quest, as shown here: [url]http://i.imgur.com/aLogKZu.png[/url] Completing the quest will give you the Curios Transceiver, which goes to your quest items and then requires 4 sequential passcodes. The passcodes seem to be identical to the order the knights spawn in the First Firewall mission (Knights and Taken knights representing the values). Tranceiver passcode input screen: [url]http://imgur.com/NGvBxbB[/url] All codes courtesy of /u/kiki_strumm3er: Codes (top is 1): ● 1 2 1 1 2 2 2 1 2 ● 1 2 1 1 2 2 1 1 ● 1 2 2 2 1 2 2 2 1 1 ● 1 2 1 2 1 2 1 1 After 4 passcodes you get access to a new mission called Shadow Call which requires you to reach the top of the Devil's Spire (Cayde's Stash mission location) within a time limit to collect your reward, which is the IKELOS Fusion Core. The Fusion Core requires 5 modules to be repaired. [b]Heavy Power Coupling[/b] - Dismantle any legendary or higher heavy weapon. [b]Ionized Shell Harmonics[/b] - Complete the Archives mission on Venus on any difficulty. [b]WARSAT//MK19/TERRA/RSPN[/b] - Complete a 'Defend the Warsat' public event on Earth. [b]WARSAT//MK19/LUNA/RSPN[/b] - Complete a 'Defend the Warsat' public event on the Moon. [b]WARSAT//MK19/MARS/CHLM[/b] - Complete a 'Defend the Warsat' public event on Mars. For help finding Warsat events, check out [url]www.destinypublicevents.com[/url]. Note that the Warsat at the beginning of the Fallen S.A.B.E.R. strike does not count towards your Earth Warsat completion. Completing all 5 modules awards you with the Reassembled IKELOS Fusion Core, which must be brought to the Gunsmith. Turning it in results in a dead end, and it seems most likely that the next step is time gated. [b]Step 2:[/b] The Quest Continues, the Gunsmith gives you a Quest saying to Investigate Vault RAS-2 in the Cosmodrone. You need to do the FALLEN S.A.B.E.R stike on light level 280 (level 42) Once completed you will be given a frame, return to the gunsmith and you got yourself the sleeper simulant (attack 290)