To correctly make Coen's mother's medicine in The Blood of Dawnwalker, you must use hot water and add three spoonfuls of herbs. If you mess this up, Esme won't get better, and she will remain very weak during the Mass. Thankfully, even if you forget what to do, you can rely on Auto Save to return to the nearest save file and try again.
After getting the herbs from Anca, the Withering Away quest will change to: Bring the herbs back to Pieter and read the recipe from Anca. So the game already reminds you to read the instructions in case you forget, but since the first task is to bring the herbs back to Pieter, you may end up being stuck in the story and unable to read the recipe.
Here are the Instructions from Anca regarding how to prepare your mom's medicine in The Blood of Dawnwalker: Brew three scoops with water that's hot, but not quite boiling. Give to Esme before mass, then twice daily.
Therefore, when you're faced with the choice between:
The correct answer is to use hot water, as Anca said to use "water that's hot, but not quite boiling."
Next, when you must add spoonfuls of herbs:
You must add three spoonfuls of herbs to get the correct dose for Esme's medicine in The Blood of Dawnwalker.
The part below may contain spoilers. Proceed with caution.
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