From NexusClash Wiki
Characters with this skill cast more effective Glyphs. The exact effect is dependent on the class of the character with the skill:
- For the Dark Oppressor, Wyrm Master and Corruptor: Glyph Mastery doubles the duration of all Glyphs.
- For the Advocate, Archon and Lightspeaker: Glyph Mastery increases the HP of Glyphs vs Evil by 50%. Learning the Hand of Zealotry skill or joining the Accord of the Sun-touched guild extends this bonus to Glyphs vs Neutral.
- For the Conduit, Wizard and Lich: Glyph Mastery increases the duration of all Glyphs by 50% and increases the HP of all Glyphs by 25%.