Skill Mastery

From Requiem Wiki

Skill Mastery is the total number of skill points you have spent on all your skills. Your skill mastery is used as a prerequisite in purchasing skills. The amount of skill mastery needed for a skill is generally equal to the skill's level prerequisite -10.

For example: Level 1 of the warrior skill Courage has a level prerequisite of 14 and a skill mastery prerequisite of 4. In order to put a skill point into level 1 Courage you would have previously had to have spent 4 or more skill points on other skills.

You can view your current Skill Mastery in the Skill Window (Default UI Shortcut: K).