The second upgrade of Sayla's hut will grant you the recipe for the antidote. At least it worked for me, I can craft antidote while I haven't taken on either Dah or Ull yet. #1. Al3oqab Dec 28, 2018 @ 5:55am. You craft it using the rare yellow flowers, same place you craft healing items etc. #2. xFtfHLi.