The final item should look like a vial similar to the skooma one, but smaller and less ornate. An empty vial variant as a misc item should also be included in the ESP.
Nedic sword for SHotN's The Ransacking of Ruvheide Barrow quest - should be UNI item for the quest, but whether there would be separate version that could be used as rare loot in nedic dungeons is up to the lorebeards to decide.
For better context, here is the description from the quest:
ancient High Rock artifact brought back to Skyrim during one of the many High Rock raids of the First Era
