Final answer:
The moonstone appears to be used in potions for foresight, love or binding, and healing or fortification. These uses are speculative based on the thematic clues and traditions described around moonstones and mystical practices.
Step-by-step explanation:
The moonstone is a mystical element that appears in various potions and is steeped in esoteric and magical tradition.
When analyzing the information provided with references to a 'wondrous talisman torn from the forehead of the foal' and the conjuring of powerful forces through curse tablets, it is suggested that the moonstone is used in potion making involving arcane and divinatory practices.
The three potions that moonstone might be used in, judging by the clues given, could include:
- A potion for seeing into the future or discerning hidden truths, as the description of the stone and the foal's forehead talisman seems to emulate properties of foresight and protection.
- A potion for love or binding, much like the curse tablets described which aim to secure affection and loyalty from a chosen individual.
- A potion for fortification or healing, possibly deriving from ancient practices of using gemstones and minerals for physical and spiritual remedies.
It is important to note that the description of moonstone specifically in potion-making is not detailed, and the information provided is more thematic and speculative rather than explicitly instructional.
Nevertheless, the vivid imagery and connections to magical lore suggest these possible uses for the mysterious moonstone in potions.