The mission thread of Thiollier In Elden Ring: Shadow of the Erdtree, it's not overly complicated to complete. Getting through it can be a pain, but following the quest itself is pretty straightforward… until you get to a very specific point where FromSoftware gets a little mischievous. Here's how to solve the puzzle without giving away any story spoilers.
First you must meet Thiollier, aka the Lord of Poisons, along with the Grace called Cross of the Path of the Column in the Plain of Graves, south of Ensis Castle. Just make the introductions and exhaust all the dialogues. Then you must advance through the Shadow Realm until you see the message “A Great Rune has been broken” and head to The Fissure in the southernmost area of the entire map.
Advance through The Fissure until you reach the final boss and defeat him. At the back of the combat arena you will see a cave with a plant-human being. It offers you two options: Drink the nectar or Leave. Drink without fear and die. Common sense will tell you not to drink more, but I tell you to repeat the action up to seven or eight more times.
![Elden Ring Puzzle Mission](https://i.blogs.es/beb39c/elden-ring-puzle-mision/450_1000.webp)
![Elden Ring Puzzle Mission](https://i.blogs.es/beb39c/elden-ring-puzle-mision/450_1000.webp)
1. Cross of the Path of the Column, 2. The Fissure
Then visit Thiollier, tell him everything you have seen and return to the cave. She talks until she runs out of dialogue, drinks again, and repeats until she finishes the quest thread. I don't need to tell you where you end the thread, because Elden Ring makes it very clear. When in doubt, he tries to drink a few more times just in case.
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