Chapter 400: Regulus Teaches a Lesson
Magic sense was what Regulus meant to teach.
At its simplest, it was an innate sense of magic, like sight or hearing. Most wizards never trained it deliberately, and while some awareness developed naturally with age and experience, its depth depended on talent.
At the lowest level, a wizard could only sense whether magic was present. At the highest, they could perceive how magic moved, where it gathered, what character it carried, and even the structure of a spell as it formed.
That ability was essential for advanced magic. Potioneers needed it to track magical changes as ingredients fused. Alchemists needed it to perceive the magic within materials. Gringotts curse-breakers relied on it to detect layered enchantments, while Aurors needed to read a spell's shape and direction before it was fully cast.
Most Pure-blood families taught magic sense eventually, as did some Half-blood families. Tradition usually meant waiting until a child's magic and mind had matured.
Cuthbert and Hermes would learn it eventually, and Alex probably would as well.
Lina and Samuel were different. Without Regulus, they would likely wait for their abilities to develop naturally.
Regulus disagreed with that approach. Magic sense, like magic control, was a foundation, and foundations were best built early.
Since the opportunity had presented itself, he would teach them.