Elemental Sword

Description
The Elemental Sword has the shape resembling both fire and ice. Unlike the Fiery Dragon Sword, Icy Dragon Sword or Fiery Gladius, however, the "fire" and "ice" are not animated and are part of the sword itself. Also, since it has no fixed elemental sword hilt, that means it can be upgraded with another hilt.

Location
It has been reported that this sword drops rarely from chests in the Realm of Torment, Hall of Heroes and the Desolation.

The Desolation Realm of Torment Hall of Heroes
 * Dropped by Sandstorm Crag and Shambling Mesa as well as Graven Monolith
 * The Sulfurous Wastes
 * Ancient Elonian Chest
 * Mandragor Terrors in Hard Mode
 * Ravenous Mandragors in Hard Mode
 * Graven Monoliths (during "A Show of Force" in Hard Mode)
 * Locked Chest in Hard Mode
 * Diamond Djinn
 * Joko's Domain
 * Ravenous Mandragor (only seen during A Deal's a Deal)
 * The Shattered Ravines
 * Bladed Dune Termites in Hard Mode
 * Locked Chest in Hard Mode
 * Poisoned Outcrops
 * Diamond Djinn
 * Ancient Elonian Chest
 * Locked Chest in Hard Mode
 * Domain of Secrets
 * Locked Chest in Hard Mode
 * Chest

Dye
Cannot be dyed.

Trivia

 * Bears a resemblance to the Artifact/Equipment card "Sword of Fire and Ice" from the Magic: The Gathering trading card game.