Destiny 2: The Fourth Horseman Exotic Quest – Enter the Vault

ENTER THE VAULT EXOTIC QUEST

Live Now – Requires Season of the Worthy Season Pass

Gain access to the vault through the secret pathway in Zavala’s office.

“I’m trusting you, Guardian.” —Commander Zavala

Quest Steps via light.gg

Enter the Vault: Gain access to the vault through the secret pathway in Zavala’s office. (Here is a video of how to find the office location)
Missing in Action: Return to Zavala and inform him the weapon is missing from the vault.
Fresh Lead: See if Ana has some tech to help track the missing weapon.
On the Hunt: Collect intel for Ana by defeating Cabal or completing public events on Mars.
Return to Ana: Take the collected intel back to Ana and see what she can discover.
In the Shadows: Ana will need you to bring her some information from Calus’s double agents in the Red Legion. Defeat Psions and loot Cabal chests to gather it.
Under Our Nose: Now that you’ve gathered intel from Calus’s agents, see if Benedict 99-40 can be persuaded to help.
Dirty Work: Benedict needs you to eliminate the encryption signals coming from the EDZ. Defeat combatants, complete public events, and complete patrols.
Rein It In: Return to Benedict 99-40.
Lost and Found: Benedict has given you the location of the missing weapon in exchange for using this Cabal slayer to smash the Red Legion.

Players having issues entering Zavala's office in the Tower will need to go to Orbit and re-enter the Tower for the door to open.

— Bungie Help (@BungieHelp) March 17, 2020

Exotic Quest Reward

The Fourth Horseman – Exotic Shotgun

Weapon Info:

Energy | Elemental: Arc
Thunderer: This weapon’s rate of fire is increased significantly, and fires full auto.
Broadside: Each successive shot has more damage and more spread.

Other:

Catalyst: Adds an additional round to the magazine and increases reload speed. (How to obtain: ?)
Exotic Weapon Ornament: Death Comes Calling (Available at Eververse this week – March 17 -24)