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History of Fortress Philters

Revision 25134 by archivist at 2026-10-10 09:22:08

Overview

Fortress Philters is a Triumph in Destiny 2. The objective is to discover all tonics related to the Exotic mission Kell's Fall.

Kell's Fall is a Season 25 Exotic mission from Episode: Revenant Act III. It takes place in Fikrul's Revenant Fortress on the Tangled Shore, and it has Standard (1955 power) and Expert (2015 power) difficulties. The central tonic is Eido's "lethal tonic", made to permanently kill Fikrul.

How to complete

  1. Run Kell's Fall. Its main rewards include Tonic Supplies, alongside the Slayer's Fang shotgun.
  2. Follow the storyline, which centers on Eido's tonic. The mission has three variants (Reflection, Distortion and Diffraction). The tonic plays its key role in Diffraction, where a stake-like item made by Eido and the Apothecary delivers the tonic into Fikrul's heart.
  3. Defeat the Scorned Organist, a secret boss. That fight is tied to Eido's Act III Key Fieldwork, which becomes available after all tonic formulae are discovered.

The mission's first completion grants the Slayer's Fang, with guaranteed Deepsight Resonance.