Dark Brotherhood Style
The Dark Brotherhood style is a style of gear coming to ESO with the Dark Brotherhood DLC half way through 2016.
Dark Brotherhood Motif
At this time we don’t know how the Dark Brotherhood Motif will be obtained. It will most likely be similar to the Xivkyn, Glass and Ancient Orc Motifs in that it will be possible to obtain all of the individual chapters separately. The entire Motif may become available in the Crown Store at a later stage as well.