Lava Sword

The Lava Sword is basically a Sword that can also deal heat damage. Since heat damage works well against most mobs (e.g. Ghosts), Lava Sword is a reliable source of damage as long as the opponent does not have armor that protects against heat; the only mob that can efficiently withstand the Lava Sword without the help of some item or effect is the Golem. A Minotaur with any armor can also prove a bit troublesome, but generally it can pull through against tough opponents, like a Troll or a Ghost.