Large Blue Rocket Cluster

The Large Blue Rocket Cluster is a type of firework associated with, but not exclusive to, the Lunar Festival event.

A Cluster Launcher is required to use a Large Blue Rocket Cluster. (see Notes section)

Source
Large Blue Rocket Clusters are crafted by engineers with a skill of 275.

The schematic for Large Blue Rocket Cluster is contained in which can be purchased for  from  in Moonglade during the Lunar Festival.

(Unlike several of the Lunar Festival fireworks, this item can only be crafted by Engineers.)

Object of
requires that you launch eight Lunar Fireworks (color and size not specified) and two Cluster Fireworks (color and size not specified). Large Blue Rocket Clusters are a Cluster Firework.