History of Count on Khvostov

Count on Khvostov is a Campaigns triumph in the Monument of Triumph for The Final Shape: complete the mission "Ascent" and defeat 75 combatants using only the Khvostov 7G-0X Exotic Assault Rifle. It rewards 30 Legendary Marks (ProGameTalk).

How to complete

1. Unlock Khvostov 7G-0X first. Per Gfinity, this means finishing the Iconoclasm mission, collecting Lost Encryption Bits in the Pale Heart of the Traveler, opening the Cosmodrome Wall chest for the Legendary version, then finishing the Overthrow bosses and returning to Lost City tower for the Exotic version. Requirements may have changed since.
2. Replay "Ascent" with only Khvostov equipped in your weapon slots so every kill counts.
3. Every seventh shot ricochets to nearby enemies and Orbs of Power strengthen it, so it clears groups of weaker enemies well (Gfinity).

Ascent was not described in the sources opened, and the creator video on YouTube (id 2mlzHEYInxk) could not be read, so mission-specific tips are unconfirmed.

Rewards

30 Legendary Marks.