(Note: Information taken from Overlord Wiki)

While originally used by Players of the VMMORPG (Dive Massively Multiplayer Online Role Playing Game) Yggdrasil over the course of time, and numerous Player 'arrivals', the Tier Magic System as become the started form of magic in most of the New World.  Tier spells are divided between 3 groups of magic and 11 tiers of power.

Groups include:

Arcane: Traditional magic. More western in nature.

Divine: Restorative or healing spells used by priests. Divine magic casters could, after using spells which enhanced their physical abilities, end up stronger than a half-baked warrior. 

Spiritual: Oriental type magic that uses talismans or psychic spells. More eastern in nature.

There are 11 tier of power for Tier Spells. The following is a short explanation of power, equvilent level, and how it is seen in the New World.

Tier 0: Not true tier of magic; includes things such as parlor tricks or slight of hand games. People at this rank are not considered mages.

Tier 1 (Level 1 - 7): The most common level of magic. Many practical magic are included in this tier. Anyone can use 1st-tier magic by training, though it takes too much time and effort for those without talent. Those capable of performing this tier can earn proper pay as a kind of special worker.

Tier 2 (Level 8-14): These are spells for those who have talent, numbering 1 in 5,000 to 1 in 10,000. It is the common goal of normal magic casters. Those who achieve this tier can earn a good income and reputation.

Tier 3 (Level 15-21): Only the brightest achieve this tier. 3rd tier magic casters are quite rare and they were considered to be most likely a platinum-rank Adventurer at the very least.

Tier 4 (Level 22-28): The highest tier that Fluder Paradyne's most skilled acolytes have managed to reach under his guidance.

Tier 5 (Level 29-35): A tier that very few have reached, among them the Thirteen Heroes 200 years before the start of the story. They are widely considered the pinnacle of mankind.

Tier 6 (Level 36-42): The highest tier magic for most inhabitants of the New World. It is said there are currently four humanoid magic casters who could cast 6th tier spells in the entire continent, including Fluder Paradyne himself.

Tier 7 (Level 43-49):  Spells that only exist in legends. The Thirteen Heroes were said to be capable of using 7th tier spells, and a few individuals outside the group are rumored to use one.

Tier 8 (Level 50-56): In the New World, these spells are considered to be within the Mythical Realm.  It is considered a Tier of magic beyond the means of any single human. Some large rituals can be used to boost a 5th tier spell to a power between the 7th and 8th tiers; but requires a large gathering of mages pooling their efforts.

Tier 9 (Level 57-63):The only record of 9th tier magic in the New World right now are spells of Ainz Ooal Gown.

Tier 10 (Level 64-70): The existence of 10th tier magic is known only to a select few individuals.

Super-Tier Magic (Level 70-100): Referred to as 11th Tier magic by the New World, and more commonly known as magic of the gods It is labeled as the highest form of magic above all other tiers. It is suspected to have been at least once between 500 to 200 years ago before the present day. It is a catch all tier of all 'End Game' magic in Yggdrasil.

Citrinitas (lv 90)

Racial Levels (30 lvs)

• Homunculus (15 lvs)
• Superior Homunculus (10 lvs)
• Perfect Homunculus (5 lvs)

Job Levels (60 lvs)

• Alchemist (15 lvs)
• Grand Alchemist (10 lvs)
• Hermetic (5 lvs)
• Enchanter (10 lvs)
• Occultist (10 lvs)
• Esoteric (10 lvs)

Stats
HP (40)
MP (100)
PHY.ATK (20)
PHY.DEF (15)
AGILITY (15)
MAG.ATK (95)
MAG.DEF (70)
RESIST (100)
SPECIAL (100)