Valde Vetus Unus

Valde Vetus Unus, Great Old One, Priest of the Frozen Seas is one of the seven outsiders. It lived in Nexus and guarded the Northern part of Tolaine. It was around six hundred meters high (or perhaps more) and as wide as a mountain wall. It has slimy, octopus flesh and living tentacles hanging of its neck. On the tip of its nose, its human face can be seen. Countless of parasites lived on its body, becoming corrupted by its blood, acting as shock troops in battle. (c81)

Valde Vetus Unus is allegedly the largest of the outsiders, although Faith claims otherwise, likely saying that Mare Dentibus was larger. Shun claims it was the least dangerous one, as it sleeps often.

Faith and Cassandra encountered this outsider at the lowest level of Nexus, when it nearly ate them after they fell into the water. Later, they splattered a Fruits Of Labor on omen, attracting this outsider to attack the man. Omen fought the Outsider directly, shaving off its tentacles while Faith and Cassandra climbed its body to escape to the higher levels of Nexus, fighting off its corrupt lice. Omen defeated the outsider, gaining its strength, and used it as his god form, attacking Noble's castle before quickly being dispatched by the combined power of the awakened of Alphonse.