Manaparticles

In this world, magic is powered by Mana, which is the divine energy flowing within Manaparticles. Each individual possesses a unique amount of Mana, which can be increased, albeit controversially, by taking life. When casting spells, magic users draw upon their Mana reserves. The amount of Mana required varies depending on the spell's complexity and power. As magic users gain experience, they can use Mana more efficiently.
Additionally, there are permanent Manaparticles that, once utilized, provide a significant but finite source of power. However, once this permanent Mana is used, it cannot regenerate. This adds a strategic element to magic use, as magic users must carefully consider when and how to utilize this limited resource.
Magic users can be identified by their Soul Color, which reflects the amount of Mana they possess and use. This unique characteristic distinguishes magic users and reflects their proficiency and strength in wielding Mana.
When normal Mana is used to enhance specific abilities, it manifests through a radiant glow. For instance, when someone enhances their agility, their entire body could radiate with a shimmering light. If someone enhances their sword skills, the sword or the hand wielding it could appear in a radiant glow. These visual effects not only give magic a dynamic and vibrant quality but also serve as an aesthetic display of the applied skills and the intensity of Mana usage.