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.

Casting
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, Covenant, 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 reincarnators.

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 where a pillar of light rains down from the sky), 「Sanctuary」(Ritual magic that prevents teleporting and nullifies curses), and「Seal.」(Ritual magic that seal 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 and has power proportional to the surrounding environment, therefore, something like holy water can be prepared before a battle to help increase the magic's power. 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.

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.