Razorpine

The Razorpine is a weapon dropped by the Everscream during the Frost Moon. It works somewhat like the Leaf Blower, firing a large number of projectiles at "insanely fast" speed, but fires between 2-4 projectiles per tick, much like the Bat Scepter. These projectiles have an extremely high velocity, and behave much like Throwing Knives, but with a longer flight distance before they begin to fall. Best prefix for this is Godly, since it appears that magic weapons can not be legitimately modified to cost less than 2 mana per use.
 * This is not truly the case, since magic weapons can have their cost brought down by other items and consumables which lower mana cost. Try wearing Spectre Hood, Diamond Robe, and Mana Flower, for example. Even with Godly, magic weapons can be brought down to 1 mana per use. A couple of examples of this are Godly Bat Scepter, Masterful Aqua Scepter.

Due to its insanely fast speed and high damage per hit, this weapon currently has the second highest damage output of any magic weapon currently available (Blizzard Staff has the highest), though the Bat Scepter's homing ability might make it worth using in some cases.
 * Though it gets the highest damage output when targetting big enemies or enemies with multiple segments because its projectiles pierce through them.

Top DPS Magic Weapons:

Razorpine

48 Base * average 3 projectiles * 60/8 (7.5 uses a second) = 22.5 projectiles a second = 1080 DPS before gear/enchants. Highest prefix is Godly.

vs Blizzard Staff

58 Base * 4 projectiles * 60/10 (6 uses a second) = 24 projectiles a second = 1392 DPS before gear/enchants. Highest Prefix is Mythical, which has a 10% speed increase = 26.67 projectiles a second ~= 1547 DPS before gear/enchants other than speed.

vs Bat Scepter

Former top DPS magic weapon. 45 * 2 * 60/12 (5 uses a second) = 10 projectiles a second = 450 DPS before gear. Godly Is highest prefix.