Eidolons are heavily fragmented Sentients. They are typically moribund (i.e. close to death) and wander aimlessly in search of fragments to revitalize itself. The most notable examples of Eidolons are the Eidolon Teralysts that roam the Plains of Eidolon. The term 'Eidolon' refers to a Sentient... More @Wikipedia
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