Primeval Armor Remnants

Primeval Armor Remnants is an item that is used to upgrade the visual appearance (but not the stats) of the armor of many heroes: Koss, Dunkoro, Melonni, Acolyte Jin, Acolyte Sousuke, Tahlkora, Zhed Shadowhoof, Margrid the Sly, Master of Whispers, Norgu, Goren, General Morgahn, Zenmai, Olias, and Razah.

Usage
Applying Primeval Armor Remnants to a hero's armor will upgrade their armor to the hero version of the "Primeval Armor" look. (Note that the hero version looks different from the player version.)

You only need one Primeval Armor Remnants in order to upgrade one hero's whole armor set.

To apply the armor you need to visit the NPC Armorsmith of Whispers in Gate of Anguish.

Acquisition
Primeval Armor Remnants can be obtained in the Domain of Anguish and during The Ebony Citadel of Mallyx mission. This item does not drop, but instead appears in players' inventories at random whenever a Domain of Anguish chest is opened or one of the Lords of Anguish is defeated. Furthermore, when Mallyx the Unyielding is defeated a chest spawns which contains one Primeval Armor Remnant for each party member. One Primeval Armor Remnant can also be obtained randomly from a Coffer of Whispers.