Core of an Unknown Titan

Core of an Unknown Titan can be found on the corpses of all creatures in Korthia, more likely on rare and rare-elite enemies (for Conquering Korthia), and inside other Relic Fragment-containing lootables around the zone. Turn the item to Archivist Roh-Suir at the Reliquary of Remembrance of Keeper's Respite for 300 Cataloged Research and 150 reputation with the Archivists' Codex.