To extract blood, simply loot the corpse of a deceased person with the Essence Extractor in the inventory. Blood samples can be acquired from any dead body in Skyrim, not just those killed by the Dragonborn or their followers.
- It can be looted off Septimus' body after he is killed by Hermaeus Mora.
- Going to Blackreach is a good way to obtain some of the necessary blood samples. There, you can find Falmer as well as Dunmer and Orsimer 'Falmer Servants'. They are easy to kill and there is no consequence for doing so.
This section contains bugs related to Essence Extractor. Before adding a bug to this list, consider the following:
- If this item is dropped anywhere after looting it from Septimus Signus, it will vanish, and cannot be retrieved. This doesn't affect storing it in containers, however. Return to Septimus's ash pile and one should find another.