A rod is a large, oblong ballistic object thrown by the Geometers of the Daban Urnud from orbit at various targets on Arbre during the Advent to extremely destructive effect. First used during the Visitation of Orithena in an attempt to destroy Lise, her vessel and all of the evidence it contained of the Polycosm, rods contain no ordnance of any kind. The explosive force results entirely from the velocity and heat achieved passing through Arbre's atmosphere.

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