Shatterheart

^{Mistveil → Items → Shatterheart}
Shatterheart
Aura: strong transmutation & strong evocation
CL: 18th
Slot: None (held)
Price: 70,000gp
Weight: 4 lb

Shatterheart is a +2 Frost Longsword that has a decorative blue blade but by speaking the command word and activating the blade as a move action, the blade breaks away leaving just light in the shape of the blade.

While in this form, Shatterheart is a +0 Frost Brilliant Energy Longsword. Activating the sword again causes the metal shards to reform, covering the blade of light, and it returns to its previous form.