While the usage of magic varies greatly depending on the nature of the caster, some principles of magic seem to be universal.
Black magic[]
According to Nightingale's dated definition, Black magic is the use of magic in a way as to cause a breach of the Queen's Peace.[1]
Glamour[]
Glamour (or Compulsion or Seducere) is a way for magical creatures to make others do what they want.[2]
Lacuna[]
Lacuna is a spot with a noticeable higher amount of excess magic.[3]
Obligation[]
When you take part in food or drink at the home of a person with magical powers, you might be put under obligation to that person.[4]
Potentia[]
Potentia is a word coined by John Polidori, describing where magic comes from.[5]
Ritual[]
A ritual, unlike spells, not only contains forma but also the use of certain paraphernalia to help the process.[6]
Sequestration[]
Sequestration is the act of taking forcible possession of someone.
Signare[]
Signare is the individual signature of individual practitioner's spells.[7] Signare are shaped by the caster, their teacher, and the magical tradition.[8]
Spells[]
A spell is a series of forma attached to bring about an effect.[9] Different countries and regions have different traditions and spells, Newtonian and Non-Newtonian Spells.
Vestigium[]
See Main Article: Vestigia
Vestigia is described as an afterimage, and can manifest as feelings, smells, tastes and sounds. Intense vestigia can be created by magic, but all living things seem to create some amount of it.[10][8]
Peter Grant developed the term 'yap-scale', to quantify the strength of vestigia. The term 'yap' is a reference to the amount Toby yaps in the presence of the vestigia.[11]