Horus Heresy · atlas

Ship · loyalists

Invincible Reason

Stronghold: Caliban · Segmentum Obscurus

Fig. 1 · Stronghold on the map

Invincible Reason — the first Gloriana-class ship built, flagship of Lion El’Jonson, with workmanship unsurpassed by later vessels; ~28 km long, with a processional gallery along its entire length beneath the dorsal spine. In the Thramas Crusade it ploughed into the traitor line, launched boarding assaults and inflicted catastrophic damage on Nightfall. The captive Curze was held aboard in chains.

Category
Ship
Side
Loyalists
Key events
4 events
Forces
Flagship of Lion El’Jonson / the Dark Angels (I); the FIRST Gloriana built, ~28 km from bow to stern, weighing a billion tonnes — colossal even for its class.

Fate

Survived the Heresy and remains the flagship of the Dark Angels fleet to this day.

Key events

Sources

  1. Lexicanum: Invincible Reason
  2. WH40k Fandom: Invincible Reason
  3. Atlas compilation · source check 2026
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