Like all +5 weapons, the DM will add +5 to the AC hit when using this weapon but the damage bonus has already been factored into the damage wheel.
When the wielder of this weapon scores a natural 20 with an attack, all attacks made by the victim suffer a -2 damage penalty. A second attack with this weapon which scores a natural 20 will reduce the victim’s melee damage by an additional 2 points, but -4 is the maximum penalty this weapon is capable of inflicting. It doesn’t matter how many Wicked Spears the party possesses or who used them.
The damage penalty effect of this weapon is triggered by sliding a natural 20.
When used by bards, their bardsong grants each party member a total of +1 To Hit & +3 Damage (+2 To Hit & +4 Damage if the bard is 5th-level) to their melee and ranged attacks. The bard may physically attack while playing this instrument and/or initiate one Free Action.