Coltello

The Coltello is a specially crafted rare dagger that can only be found by completing a quest. This quest will automatically appear in your Quest Journal when you reach Dagger skill level 15. This weapon has a wickedly curved blade and is bladed on both sides. They have not made any set of daggers that look like this, so they will, presumably, add some.

Note: If you have already completed the Coltello quest and sold the Dagger, you cannot obtain it again.
 * Attack Power: 11
 * Abilities: Powerful Rank 3
 * Level Required: Dagger 15
 * Cost: Can only be obtained from a Quest