Magic

The world this series takes place in has magic deeply ingrained. Magic is typically an invisible substance, however, a few individuals like Naofumi can perceive it. Monsters are occasionally called magic beasts due to their affinity with magic. The magic beasts with the highest magic affinity are the Filolial and Dragons if Guardian Beasts like the Spirit Tortoise who is capable of using unique magic skills such as supergravity magic aren't considered. Each world has their own magic systems but they can be used in other worlds such as when Filo uses music magic in Raphtalia's world.

Raphtalia's World
Magic is regulated by the amount of mana (MP) and the level of skill possessed by the caster. The main classes of magic are Ritual, Ceremonial, and that which is part of the Way of the Dragon Vein, but there are also some forms of magic that aren't part of any system and may require magic circles and/or rituals such as a "Class Up." Some individuals are capable of using magic unique to them, such as event monsters, the Guardian Beasts, or many of the reincarnated individuals. Casting typically requires an incantation to shape and focus the magic power, however, skilled magic users can cast without and incantation at the cost of greatly reduced power.

Ritual Magic
Ritual magic is the most common type. It is able to be learned by anyone, but the type is limited to that which the person has an affinity for. There is a class system for casting spells. The classes of magic include the weakest class "First," followed by "Zweite," then "Drifa." There is also "Liberation," which is a level above "Drifa," however, this level is only achievable by heroes because it combines both Ritual Magic and the Way of the Dragon Vein - using EP as the binding. EP is a combination of SP and life force that is only accessible once the hero learns of the Energy Boost power-up method.

Casting spells usually include a class of magic used as an adjective to determine it's a strength as well as "All" to denote if there are multiple targets. For example, "All Zweite Aquashot" is intermediate class magic that launches multiple orbs of high-pressured water, a combination of air and water magic.

Ceremonial Magic
Ceremonial Magic is magic that can be either Ritual or the Way of the Dragon Vein magic that's performed by a group of individuals collaborating through chanting to create a powerful, typically large scale magic. The output directly correlates to the amount of magic gathered. Instances where covenant magic were used include The Church of the Three Heroes' high-class synthesis magic「Judgement」(Ritual Magic is where a pillar of light rains down from the sky),「Sanctuary」(Ritual magic that prevents teleporting and nullifies curses), and「Seal.」(Ritual magic that seals the target's power away)

Way of the Dragon Vein
Way of the Dragon Vein is one of the extinct magics that is only known and passed down by high-class monsters. It is magic that takes energy from one's surroundings instead of MP and has power proportional to the surrounding environment. Way of the Dragon Vein makes cooperative and counter-magic much easier compared to the other types of magic. One issue with taking energy from the surroundings is that the surroundings may not provide the correct type of magic. Therefore, bringing items with certain qualities, like holy water for divine magic, is suggested. Also, unlike Ritual Magic, using Way of the Dragon Vein is not a fixed process and changes according to the surroundings.

In order to learn how to use the Way of the Dragon Vein, a special blessing from a Dragon Emperor is needed for humans and Demi-Humans. In order to use the Way of the Dragon Vein, one has to figure out how the created magic is formed such as calculating that Fire + Oil = blaze or inferno + water = blaze. Wyndia can borrow the earth's power and still make fire. From Earth + Darkness, she somehow solves for the Darkness and converts that to a flame. Sadeena often says Saint before the magic's name for unknown reasons.

Music
Music can be used to cast magic without using mana and therefore can be used when traditional magic is unavailable. However, the power of the magic depends on the skill of the user. Both Filo and Itsuki are proficient in this magic.

Ofuda
Ofuda are tags infused with magic. They can be made of material such as wood, paper and stone and are written on by ink melted with magic. The type and power of the magic that is released from the ofuda depends on the magic infused into it. They only require magic to create but none to cast so they are often used as single-use spells by regular people. Examples of ofuda include fire ofuda to create fire, servant ofuda to control living creatures, and communication ofuda to act as a long-distance communication system. These are a common item in Glass' world and can be seen in marketplaces.

Jewel
Jewel magic can be cast in a similar way to Way of the Dragon Vein, except only drawing from the gem instead of from the environment. A higher quality jewel accessory will lead to a more power and range. At last resort, the jewels can sacrifice themselves in a powerful explosion but this will ruin the accessory. Therese uses this form of magic.

Magic Types
Each person has a certain affinity for specific types of magic. However, there are a rare few that can use all types of magic equally. Types of magic can be categorized by either function or element. Magic categorized by function includes, but is not limited to Support, Recovery, and Illusion.

Magic categorized by element includes, but is not limited to Earth, Water, Fire, Wind, Light, and Shadow. Magic elements have strengths and weaknesses against each other. For example, fire is weak to water, water is weak to electricity, and curses are weak to holy magic.

Mana
Mana (MP) and SP are separate systems. Mana is used in casting magic while SP is only possessed by heroes and is used when using weapon skills. Mana can be taken from others through the use of special items (ex. Soul Eater Shield's「Soul Devour」or Spirit Tortoise Heart Shield's「C Magic Snatch」) or through a natural ability (ex. Filo's magic absorption stance or the white clumps of the Spirit Tortoise).

Item Enchantment
Almost any item can be imbued with magic. That includes anything from weapons and armor to regular water. Magic items can also be crafted with the assistance of magic resulting in higher quality products. Many "skilled" craftsmen tend to use magic while crafting unconsciously.