Lesser glyph of infusion

This glyph can be purchased from the following merchants:
 * Preacher in Electors' Square
 * Halfling merchant, depending on Geralt's choices in Hey, You Wanna Look at my Stuff?
 * Scoia'tael merchant in the camp outside Novigrad
 * the Merchant in the Perfumery
 * Gremist
 * Runewright

It is used to craft the following items:
 * Lesser glyph of Aard
 * Lesser glyph of Axii
 * Lesser glyph of Binding
 * Lesser glyph of Igni
 * Lesser glyph of Mending
 * Lesser glyph of Quen
 * Lesser glyph of Reinforcement
 * Lesser glyph of Warding
 * Lesser glyph of Yrden