Temporal Floe Sword

The Temporal Floe Sword is a craftable Hardmode broadsword that autoswings. It fires an ice beam that deals 65% of the blade's damage. Upon contact with an enemy or tile, the beam splits into two more beams that deal 32.5% of the sword's damage. The direction that the beams split into is based on the in-game time and an analog clock, with each minute changing the angle of the first beam by 6 degrees, and each hour changing the angle of the second beam by 15 degrees, clockwise starting at 12:00 PM.

Trivia

 * The tooltip is likely a reference to The Iceman Cometh, a play that premiered in October 1946.