There are three specific types of magic that exist: Verbal, Non-Verbal, and Bloodline Magics.
Verbal Magic (Rarity: ★)
For more information, see Verbal Magic
Verbal Magic (口頭魔術) is a common classification of magic that every demon use. With only a few phrases, they are able to summon or use magic with their mana.
Non-Verbal Magic (Rarity: ★★★)
Non-Verbal Magic (無口頭魔術) is a very rare use of magic that only few demons can utilize. In order for the demons to achieve such level of Non-Verbal magic, they have to go through various training to strengthen their magic.
Bloodline Magic (Rarity: ★★★★★)
For more information, see Bloodline Magic
Bloodline Magic (家系魔術) is a special kind of magic that is unique in every specific demon family. However like any other magic, they'll need to train to help strengthen this variety of magic as well.