Stings the target, draining 4% mana over 8 sec (up to a maximum of 8% of the caster's maximum mana), and energizing the Hunter equal to 300% of the amount drained. Only one Sting per Hunter can be active on any one target.
Viper Sting is a poison, and thus can be cleansed by druids, paladins, and shamans, as well as any mob that can cleanse poison. Rogues can dispel it with [Cloak of Shadows], and dwarves with [Stoneform].
Viper Sting is used against spell casters or any class with mana.
Patch 3.0.8(2009-01-20): Now drains a percentage of maximum mana.
Patch 1.6.0(2005-07-12): Spells that drain mana will now properly report the amount of mana gained in the combat log.
Patch 1.4.0(2005-04-19): This spell can no longer be used on warrior and rogue targets. In addition, while it can be used on a druid target at any time it will only drain mana when the druid is in caster form.
Patch 0.10(2004-09-18): Mana damage has been increased.