Shadow casters

Shadow casters are images not unlike shadow puppets that were meant to be used for a shadow play. The slayer Nikki owned a mystical set of shadow casters that told the origin story of the first slayer, Sineya. Following Nikki's death, the shadow casters were kept by her son Robin.

During the battle against the First Evil, Robin passed the shadow casters to Buffy Summers. The casters were set i nmotion by Xander, with the help of Dawn, who read the instructions through a tome that came with the set. Once set, the shadow casters moved on their own accord and was able to create a portal through time and space, sending Buffy to the era of the Shadow Men, and sending a demon in exchange.