Phantom Mod/Shadow of Lava


 * The Shadow of Lava is a Post-Any Machine Boss Stab Weapon which attck like Arkhalis.
 * The Shadow of Lava autoswings, though it does not present an actual blade when used.

Sourse
The Shadow of Lava is immediately dropped when Muramasa is destroyed by being dropped into lava in The Underworld while the Steampunker is alive. Dropping the Muramasa into lava outside of Underworld or when the Steampunker is not alive will not drop it and the Muramasa will be destroyed with no effect.