entity_id,source_id,evidence_type,source_note ENT_DAC_DERZELAS,SRC_HERODOTUS_HISTORIES,direct attestation,"Herodotus Hist. IV.93-96 provides the Getae/Thracian religious context (Zalmoxis, immortality beliefs) within which Derzelas's regional cult develops. Not a direct source for Derzelas but establishes the Dacian-Thracian religious matrix."