Sidewinder is a Level 60 Bard Ability. It is an instant use, 60 second recast ability that normally delivers an attack with a potency of 100. If the target is suffering from one of Bard's Damage over Time (DoT) Weaponskills -Venomous Bite or Windbite -the potency is increased to 175; if both, 260.
Sidewinder returns as an ability of the Hunter class, learned for 300 AP from the Hades Bow. It deals double damage to monsters while dealing normal damage to everything else, and has the same range as the user's equipped weapon.