Saturday Night Fever

 causes all players in range of the caster will be compelled to disco and enter a limited Berserk state. Berserk targets will continuously lose HP and SP as well as lose huge amounts of defense and flee rate, yet they will gain a large amount of physical ATK. Item usage is disabled in this berserk state, and affected players will be forced to sit on the ground for 3 seconds after Berserk wears off. If the skill succeeds in affecting more than 7 players at once, the Lord of Madness will appear deal 9999 damage to all affected. An instrument/whip is required to cast this skill.

Patches

 * Patch (2019 Apr. 17)
 * The effect that was given to the existing friendly/enemy player is changed to be given only to the enemy player.
 * The chance of success is changed to increase by the caster's Lesson level.
 * The evasion rate and hit rate reduction effect are adjusted to absolute values in %.
 * Existing skill cooldown changes from 180 seconds to 60 seconds, and the probability of success is changed to be affected by Lesson level.
 * Existing damage is removed.
 * Consumes 5 Throat Lozenges.
 * Patch (2017 Sept. 06)
 * Skill "Saturday Night Fever", "Sound of Destruction" have their descriptions amended.
 * A description will be added to "Only available for WoE and PVP regions".
 * Patch (2012 Aug. 22)
 * Saturday Night Fever - Added additional conditions to the skill. This skill works against Players and Monsters only. Targets in Cloaking or Hiding status will not be affected by the skill.
 * Patch (2012 Jun. 05)
 * Saturday Night Fever nerfed.