Soul sword

A slightly curved blade, extremely light and sharp but also very brittle. Someone who would try to handle it like a longsword for example will quickly break the blade into two.
The blade supposedly comes from a land in the north where warriors, named blademasters train years before they can properly use the blade, impressive and interesting, but rather inefficient.

Specifications:

Type: Melee weapon, Dexterity based.
STAT requirement: DEX 10
Cost: 10gp
Weight: 3lbs
Properties: -
Damage: 1d8 slashing damage