The Molten Stave can be obtained by going to the underworld. On left click it shoots a molten eruption at the location of the cursor, even if there are blocks in the way. Upon right clicking, it will summon a lava guardian that fires projectiles at enemies. Since it is not an auto-swing weapon, this weapon may be considered a downgrade from the Haunted Ice Stave as it only applies the On Fire! debuff which is weaker than Frostburn and the DPS isn't remarkably greater.