Proprietary Formula is a quest available in The Elder Scrolls Online. Alchemist Nilyne Hlor doesn't trust the proprietary formula the Maulborn use to make their curative. She wants to examine a few bottle so she can determine how the elixir is made.
- Collect five Maulborn Curative
- Talk to Nilyne Hlor
Defeat the Maulborn inside the catacombs and collect the Maulborn curative.