Crescent Scythe

Crescent Scythe: Consisting of a staff with a half-disc blade on either end, the crescent scythe is a variation of the standard glaive. The edge of the blade is perpendicular to the shaft, allowing you to whirl the weapon in deadly circles. When used in conjunction with the Whirlwind Attack feat, a crescent scythe deals an extra 1 point of damage.
Exotic Two-Handed Melee Weapon
Cost: 50 gp
Dmg (S) 1d6/1d6 Dmg (M) 1d8/1d8 Dmg (L) 2d6/2d6
Critical: x3
Range Increment:
Weight: 20 lb
Damage Type: Slashing

Source: Sandstorm