Just as monsters have ranks, skills are classified into grades: Common, Rare, Legendary, and ????
Unlike magic, which requires a significant amount of mana, skills consume far less. Activating a skill is as simple as thinking its name, though alternative activation methods also exist.
The Difference Between Skills and Magic
Skills are always composed of two words—any more, and it becomes a spell. For example:
Thermal Vision (2 words) = Skill
Fire Call, Firefall (3 words) = Spells
The longer the incantation, the more powerful the spell—but also the greater its mana cost. If a being attempts to cast a spell with an incantation beyond their mana capacity, they will suffer a penalty.
As the story progresses, I'll gradually reveal more details. For now, I wanted to clarify this distinction to enhance your understanding.