A scout-class Sith Cruiser exitted hyperspace in the space above Ryloth. A Scout Cruiser is quite similar to an normal Sith Inidictor however the gravity-well generator has been removed, the shield and weapons have been weakened and the engines and sensors have been made more powerful. It's current orders, set by Darth Ba'al, was to dispatch several drones (mindless warriors genetically created by Ba'al scitentists, they've only been programs to fight and kill. Inside their brains, there is an implant which relates info to the cruiser, where the cruiser can send orders like to fight, retreat or even die.)
Make love, not toast.