You need to get the devil's snare 1st to proceed. If you don't know how, get the minotaur essence then go to the lake. You'll be able to unlock Lothar's quest as well as the trinket
I think you have to talk to Haskell 1st to give you a list of trinkets that you can get. It usually gives herb of grace after getting the trinket but if this is the 1st time, you should talk to Haskell 1st
I have only herbs of grace and lothar Don't give me the quest 
