Dark Side dragon

It is possible that Dark Side dragon refers to Krayt Dragons, who seem to be drawn to places strong in the dark side. Or, at the least, places with strong dark side artifacts. It is also possible, but somewhat less likely, that they refer to Hssiss. A strange creature which could be considered to look like dragons, and like Krayt Dragons, seem to be drawn to places with a strong dark side aura. Hssiss are in great abundance around the ruined Sith Academy on Korriban.