Inescapable Doom

 is an active skill that can be learned by Berserkers at level 58. It cannot be ranked up.

can be performed with an axe by the Berserker as an AoE super-slow debuff skill. As the skill description says, players that were caught with this skill cannot activate evasive skills like and, enabling you to catch up to them. This skill has almost no use in PvE, but is extremely useful in PvP.

Rank table
is purchased from Tactic Instructors. This skill cannot be upgraded.

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.)