Ultimate Skill

Ultimate Skill (究極能力) is the evolved form of Unique Skill and the final evolutionary stage of Skills in general.

Ultimate Skill Characteristics
Ultimate skills, as the name implies, give the wielder ultimate power to control the very laws of nature. The only way to counter an ultimate skill is with another ultimate skill. That is the absolute, unbendable rule of the world.

Angel Series Ultimate Skills
The Angel Series were originated from Veldanava, including the Seven Virtues he owns. These ultimate skills are named after angels in Christian and Arabic ideologies. The owner of these skills are vulnerable to mind control from Michael.

Seven Virtues

 * Michael, Lord of Justice
 * Raphael, Lord of Wisdom
 * Uriel, Lord of Vow
 * Metatron, Lord of Purity
 * Gabriel, Lord of Patience
 * Sariel, Lord of Hope
 * Raguel, Lord of Charity

Other Angel Series Ultimate Skills

 * Sandalphon, Lord of Execution
 * Luciel, Lord of Sky
 * Jibril, Lord of Rigor
 * Haniel, Lord of Glory

Demon Series Ultimate Skills
These ultimate skills are created in contrast of the Angel Series, beginning with the Seven Deadly Sins. They are named after great demons in Christian and Arabic ideologies.

Seven Deadly Sins

 * Lucifer, Lord of Pride
 * Satanael, Lord of Wrath
 * Beelzebuth, Lord of Gluttony
 * Asmodeus, Lord of Lust
 * Mammon, Lord of Greed
 * Leviathan, Lord of Envy
 * Belphegor, Lord of Sloth

Other Demon Series Ultimate Skills

 * Mephisto, Lord of Illusion
 * Belial, Lord of Hell
 * Abaddon, Lord of Extinction
 * Samuel, Lord of Poison
 * Azazel, Lord of Temptation
 * Bahamut, Lord of Mythical Beast

 Rimuru Tempest 
 * Veldora, Lord of the Storm

 Veldora Tempest   Ruminas Valentine 
 * Faust, Lord of Investigation
 * Asmodeus, Lord of Lust

 Yuuki Kagurazaki 
 * Greedy King Mammon

Trivia

 * In the story, the characters pronounce Ultimate Skills using only the being they reference and not the entire names used in the wiki and translations. Meaning, it's "Ultimate Skill Beelzebuth" not "Ultimate Skill Gluttonous King Beelzebuth." This is due to the Japanese texts themselves. (See: Furigana and Ruby Characters)