BIONICLE #21: Dreams of Darkness is the twenty-first issue of the BIONICLE comic series.
The inside front cover provides brief backstory. The centerfold features information about the Rahaga. A back page advertises the new movie BIONICLE 2: Legends of Metru Nui. Another back page features a teaser of the Toa Hordika showing a silhouette of Toa Hordika Vakama. Another back page advertises the gold Vahi and Kanoka Disk of Time promotion coming to Target stores in December. The back cover advertises Bionicle-themed gear and apparel, including T-shirts, shoes, and backpacks, with more information available at www.goqubic.com.