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In the Dungeons & Dragons fantasy role-playing game, the sussurus is a type of creature.
The susurrus first appeared in White Dwarf #9 (October 1978). The sussurus appeared in the original first edition Fiend Folio (1981).
The sussurus appeared in second edition Advanced Dungeons & Dragons in the Monstrous Compendium Fiend Folio Appendix (1992).
The sussurus appeared in third edition in Monster Manual III (2004).
A sussurus is a creature covered in bamboo tubes, and when it breathes through these reedy tubes it creates its eerie "dronesong" that causes other creatures to fall asleep.