Terramorphous the Invincible is a raid boss in Borderlands 2.[1] It was conceived as a tougher follow-up to Crawmerax the Invincible found in the Secret Armory of General Knoxx add-on from Borderlands.

Terramorphous is an enormous unique thresher that is only accessible once the main story has been completed. Terramorphous can be fought multiple times for the cost of 8 Eridium to access Terramorphous Peak, and will drop different loot each time, including legendary items.


Terramorphous appears in a mission named You. Will. Die. (Seriously.) The mission can be accepted from Patricia Tannis in Sanctuary upon completion of the main story.



Main article: You. Will. Die. (Seriously.)



Terramorphous the Invincible viewed from The Bunker

Terramorphous viewed from The Bunker

  • Terramorphous can be seen from the waterfall area at The Bunker.
    • When a player spawns Terramorphous, the one that is seen swimming goes under the map, which is visible through noclipping. Sometimes, the Terramorphous under the map can be heard and even spawn tentacles to attack after the boss itself is defeated.
  • Terramorphous was designed to be fought by four level 50 characters.
  • Randy Pitchford has stated that one Gearbox employee has figured out a build in which he was able to solo the battle while publicly displaying the fight at the Gearbox Community Day.
  • The flavor texts on the unique Terramorphous's loot that he drops (the Teeth of Terramorphous shotgun, the Breath of Terramorphous grenade mod, the Hide of Terramorphous shield and the Blood of Terramorphous relic) put in order make this poem:
His teeth made them flee in shame,
His breath was of fire.
His hide turned the mightiest tame;
His blood could inspire.
  • "Terra" means related to land and to morph means to change, so Terramorphous' name literally translates to "Earth Changer", a fitting name for a thresher of his magnitude.
  • It is revealed in Borderlands: The Pre-Sequel that Jack's band of Vault Hunters (Wilhelm, Nisha, Claptrap, and Athena) were indirectly responsible for seeding the Thresher species, which is actually native to Pandora's moon, Elpis, onto the surface of Pandora itself, by smuggling two juvenile specimens to Sir Hammerlock. Hammerlock proceeded to nickname the male Thresher "Terry", which fits with Terramorphous being described as the oldest Thresher on Pandora.

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