Thy next foe is... In the seaside cave... It moves slowly... Raise thy courage to defeat it.
~ Dormin

The Second Colossus, nicknamed Quadratus, is a major antagonist from the video game Shadow of the Colossus. It is the second boss to be encountered in the game and a vessel for the essence of Dormin.



Quadratus and the other fifteen Colossi were created by Lord Emon to contain the fragmented essence of the defeated evil Dormin. He set them all to wander the Forbidden Lands, destroying anyone that comes their way, so that Dormin could never be resurrected.

Shadow of the Colossus

When a young man named Wander trespasses in the Forbidden Lands and asks the disembodied spirit of Dormin to resurrect his deceased lover Mono, Dormin agrees under the condition that Wander kills all of the sixteen colossi (tricking Wander into releasing his essence so he may be reborn). Wander agrees, and sets off.

Quadratus is the second colossus that he encounters, hiding in a seaside cave underneath the bridge to the north of the Shrine. It will burst out of the cave when it sees Wander come near and attack him, attempting to step on him. Wander must shoot the bottom of its feet when it rises up to stomp on him, causing Quadratus to fall over and allow Wander access to its back. He must then make his way to the vitals on Quadratus' back and head (and left side in Hard mode) and stab them, all while Quadratus is trying to shake him off. Once all vitals have been stabbed, Quadratus will die, collapsing to the ground and releasing the fragmented essence of Dormin contained within its body.

This fragmental part of Dormin will bring Wander back to the Shrine of Worship, where he will be prepared to face his next foe. It will later combine with the other fifteen parts to form Dormin, who will possess Wander and later be banished by Lord Emon.

Quadratus' corpse can be seen as the credits roll.





  • Alongside Wander and Gaius, Quadratus appeared as a costume in the Shadow of the Colossus pack for the game Little Big Planet 3.
  • Quadratus is the first quadruped colossi fought and the first to be fought with Agro.
  • Quadratus is the second tallest colossus behind Malus at an estimated 98 feet (29.8 meters).


           Team ICO Logo.png Villains

Shadow of the Colossus
Dormin | Lord Emon | Shadow Creatures

Valus | Quadratus | Gaius | Phaedra | Avion | Barba | Hydrus | Kuromori | Basaran | Dirge | Celosia | Pelagia | Phalanx | Cenobia | Argus | Malus

The Queen | Shadow Creatures

The Last Guardian
Master of the Valley | Armored Tricos | Armored Knights

Community content is available under CC-BY-SA unless otherwise noted.