Overchannel

 was an active skill that can be taught to Sorcerers at level 32 and can be ranked up at later levels.

can be performed with a disc by the Sorcerer. Its effect is to increases damage for next attack. It is a great idea to use it as a combo before casting Arcane Pulse or Fireblast, especially if the opponent has already been immobilized, stunned or sent to sleep. Length of cooldown varies dependent on skill rank.

This skill was removed in sorcerer revamp (NA: Spellbound patch, EU Portentous Rebirth) in October 2016. Instead sorcerer gets boost skill Mana Boost, which increases damage for fixed period of time.

Rank table
To obtain and upgrade, one must find a Magic Instructor and pay a certain price of gold dependent on rank.

Glyphs
To glyph, a glyph must be obtained and learned only once. At level 60, a character has 50 glyph points available to spend on all available sorcerer glyphs. Most glyphs, specifically common glyphs can be purchased from a Glyph Master, while fine glyphs must be looted from enemies.

(Disclaimer: As NPC shop prices vary depending on a variety of factors, the prices below are subject to variation. Only take them as benchmarks.)