Lusus naturae/ID

A lusus naturae, known colloquially as simply a lusus (plural lusii or lususes) is a member of the physically and spectrally diverse monster population native to the caverns of Alternia.

Relationship with trolls
Post-pupation, all trolls are chosen by a lusus naturae of their blood colour, which serves as a custodian and assistant in all night-to-night matters for the rest of the troll's life.

Beast communion, a common psychic mutation among bronzebloods, is especially potent on lusus naturae minds.