Let’s talk about the Stone Tablet Fragment in the Witch’s Thicket zone.
Simply fast travel to the Coven Halls respite. Make sure you’re using cooldown and spirit-boosting relics (i.e., Manisa’s Ring or Aura’s Ring), and that you have the Verboten Champion skill equipped. Then, jump into the waterfall and let the stream carry you upward.
The reason why you might need these relics is due to a bit of acrobatic platforming. You’ll use double jumps, dashes, wall climbing, and the uppercut to go from one wall to the next. Eventually, you should be able to do a double jump -> uppercut -> dash to reach the ledge (seen below).
Note: I forgot to equip the Vibrant Plume when I was doing this. I’m not sure if you could make these jumps with only that relic equipped and not the Verboten Champion skill.
Anyway, open the locked door to reach a plaza. You’ll find a letter (Eleine’s Diary 3), 800x Stagnant Blight, and the fragment.
Let’s go to the next part of our guide to finally combine everything to get the Aegis Curio.