There is a lot to do in Elden Ring, with all manner of secret quests and moments tucked away that some players might never find. St. Trina is one of them, but if you have managed to find her, then you’ll be wondering if you should imbibe her nectar or leave.
Should you drink the nectar or leave?
You should imbibe the nectar, as nothing bad will happen to you. The act itself is connected to a long quest for Thiollier, so you should likely make sure you have done the required steps of it first. Seeing as you are here in St. Trina’s cave, I am going to assume you have Thiollier with you, so let’s talk about the nectar.
You will need to drink the nectar a total of six times, and each time you do, it will kill you. Make sure the nearby Deep Purple Site of Grace is your active one, as you can quickly walk back into the cave, grabbing your Runes on the way. First, make sure you have all of Thiollier’s dialogue options exhausted, then drink the next. The fourth time you drink it, St. Trina will talk to you.
After that happens, talk to Thiollier and tell him what happened. He will deny it, so take the option to tell him again and then reload into the area. He will try to ambush you from behind, so turn around and fight him. He’s not difficult to deal with, as he himself admits he is a bit useless in battle. When he is dealt with, reload the area and head back into the cave. Talk to him, then imbibe the nectar twice more for the new St. Trina dialogue, then once again talk to Thiollier. When he is unresponsive, your work here is done.
While you did all this is complicated, but it basically sets up Thiollier as a Summon for later fights, and allows you to properly finish the linked quest above.
Who is St. Trina?
St. Trina was mentioned quite a bit in the base game and was at times referenced as a young girl or a young boy. They were quite impactful in their short time spent in the Lands Between, as an entire branch of faith sprung up around them, with priests drinking the nectar to attain a sort of ritualistic coma to try and commune with them.
They are clearly concerned for Miquella, as we can now tell from her dialogue. They wish you to kill him to save him from the prison of godhood. While areas of the game do possess art that depicts St. Trina as an adult when we meet them, they are very childlike, and it is likely that they have a similar affliction to Miquella and are unable to age.