Glyphs in the Witcher 3: Wild Hunt are special upgrade items applied to open Weapon and Gear empty slots. There are many kinds of runes, with different effects and potencies. Glyphs have a property, a certain weight, and a currency value.
Sellers from which you can purchase Greater Glyphs, Runes and Diagrams can be found here.
|Rune Icon & Name||Effect|
|Glyph of Yrden||Yrden Sign Intensity|
|Aard Sign Intensity|
|Axii Sign Intensity|
|Igni Sign Intensity|
|Quen Sign Intensity|
|Resistance to Bleeding|
|Reduction in item durability loss|
|Resistance to elemental damage|