WN/Ahura Mazda

Ahura Mazda (創造之王), is the Ultimate Skill which Star King Dragon Veldanava had. When Veldanava's core Velda reincarnated into Yuuki Kagurazaka's body, it turned into a degraded version as Unique Skill Creator until Velda was released again. Rimuru Tempest later acquired the skill after devouring Yuuki. The skill requires Information King Akashic Records in order to be used to its full extent.

Abilities
Its abilities are to create anything, including objects, skills, living beings, and even entire worlds; so long as the user has adequate knowledge about it and power to fuel it.

Trivia
To complement this skill and be able to create absolutely anything, one would need to have Information King Akashic Records.