Ultranium/Azathoth

The Azathoth is a craftable Hardmode. It can be used through walls.

Trivia

 * The name Azathoth is a reference to a H.P. Lovecraft deity, much like Cthulhu. In the Cthulhu Mythos, Azathoth is said to be the king of the Outer Gods, whose dream constitutes all of reality.