A stone used to sharpen weapons.”— In-game description
- Talk to Mynoc about his spear (requires decent perception to notice his is different), then ask Morlis for the flint. She'll ask for three batches of healing powder in exchange.
- If you don't want to give her the powders, you can talk her out of it (requires Speech).
- Just steal it from her.
- If you are caught stealing it a few times, she'll give it to you.
Once you have the flint, you can give it and a spear (you have two at this point) to Mynoc. He'll use up the two to make a sharpened spear.
Interestingly, Morlis has two pieces of flint, although Mynoc will only use one.