Thunder Strike

Thunder Strike is an active skill that that can be learned by Berserkers at level 8 and can be ranked up at later levels.

Thunder Strike can be performed with an axe by the Berserker to deal a very large burst of damage. Although this skill has slightly lower base damage than, it is a burst attack. In other words, the opponent can effectively decrease the amount of damage dealt by Cyclone by getting out of range during the execution of the skill; in contrast, because Thunder Strike is a one-hit skill, this will not be the case. Adding the fact that Thunder Strike can crit for higher damage than Cyclone (and the crit can be increased even further by glyphs) makes this skill the preferred choice when you are certain of hitting your opponent (ie. DPSing on a boss while someone else is tanking).

Like other skills that require charging, gets stronger the longer the player holds down the skill button. Attaining Rank III allows the player to move at half speed while charging. Attaining Rank IV allows the player to go into Overcharge when charging too long; this will continuously deal significant amounts of damage to the character.

Number of times the skill can be charged and the amount of damage dealt both varies dependent on skill rank.

Rank table
To upgrade to the next rank, one must find a Tactics 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 berserker 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.)