Magic

Magic Skills are gained by learning it through a Skillorb, or a Scroll, or learning the chant without error.

You could teach yourself the spells by figuring them out from the ground up with logic, but that’s not reasonable for most people. Only researchers really do that. So, normally you’ll have to use scrolls to learn magic.

The Chants are in a different language, but Keima can understand them, because of the Language Comprehension Skill.

Keima didn’t need to chant or anything, but for some reason, he used less mana when chanting and overall it just made the whole process much easier. Though doing the chant was so tedious he forgot to sometimes.

Chants
Magic chants involved using mana to move your mouth. When low on mana the chants would get disturbed, sich that you stumble over it and fail to activate the spell. Thus in the Demon Realm, there was a common technique to manually chant the spells to save on mana in situations where one had to cast many spells over a long period of time. It would save a significant amount in the long run, or to be precise, it would lessen the amount of mana used in the spells by half.

Magic Skills Rank

 * 1) Bottom-Rank
 * 2) Low-Rank
 * 3) Mid-Rank
 * 4) High-Rank
 * 5) Special-Rank
 * 6) King-Rank
 * 7) God-Rank

Survival Magic
You can cast simple Survival spells with just mana and some mental effort, but you’ll have to learn stronger spells through scrolls before you can use them.

Type of Magic
Magic spells can be further divided into groups. {Little Heal} and {Healing} are considered to be in the group of Restoration Magic.

While slave related skills are most likely in the Contract Magic category.

Spell Alteration
You can customize skills, but only like, by mixing things together. Like throwing a {Fireball} at the water to make hot water. Customizing the skill itself and making it into a new one is something only expert mages and dedicated skill researchers can do. Not to mention, it can take your whole freaking life to make a new skill if you aren’t careful. "Stop calling that skill {Create Golem} and roll with {Maker}. For real. You can pass it off as some kinda Unique Skill passed down from an ancient tribe of locals or something that way."

Summoning and Creation Magic
Summon skills involved summoning a wild monster from somewhere in the world and binding them to the summoner’s will. They drained mana as long as they were active, which made them a poor fit for dungeons most of the time, but summoning a strong monster right as a boss was needed was a fairly solid strategy. Also, the strength of the summon monster changed how much mana they drained.