After Vaan learned more about hexes from Zodreg, he became increasingly certain a third party was behind the Life-bound Hex.
Sure, curse-type hexes seemed like something evil witches would use.
However, at the same time, it could also be said that they wouldn't; they couldn't use something they haven't learned or have any knowledge about.
After all, hexes required a combination of special materials and runic inscription in the right sequence to produce magic.
In other words, preparation and knowledge was the only requirement to perform hexes. It was something that even ordinary people with zero magic could create as long as they had the knowledge and prepared the materials.
Since witches could use magic, they had a low chance of stumbling upon such a discovery.
More importantly, the world was still new to magic. Seekers of magic knowledge had barely tapped into its depth and mysteries.
