Pelagia

"Thy next foe is...Paradise floats upon the lake...A silent being wields thunder...A moving bridge to cross to higher ground."

- Dormin

The Twelfth Colossus, nicknamed Pelagia, is a major antagonist from the video game Shadow of the Colossus. It is the twelfth boss encountered in the game and a vessel for the essence of Dormin.

Past
Pelagia, along with the other sixteen 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 kill all sixteen colossi (tricking Wander into releasing his essence so he may be reborn). Wander agrees, and sets off.

Pelagia is the twelfth colossus he encounters, emerging from underneath the waters of a cliffside lake to the northeast. It will immediately attack Wander, shooting electrical energy projectiles from the tusks on either side of its head. Wander must hide below the surface of the water and either make his way over to one of the small ruined structures on the lake and hide, causing Pelagia to search for him, or sneak around to the colossus' back. Wander must climb up to Pelagia's head, where he will encounter a series of bone-like stones. By hitting them, he can steer the colossus. Wander must steer Pelagia to one of the structures and jump up on top of it. Once there, Pelagia will jump up to search for wander; it is then that wander must jump to its now exposed chest and stab its sigil. If the colossus does not die, it will retreat to the water and smash the structure, forcing Wander to repeat the process. After the sigil is stabbed, Pelagia will collapse into the lake and die, 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 posses Wander and later be banished by Lord Emon.

Pelagia's corpse can be seen as the credits roll.