The fourth state of matter, known as the Mezzicanley Wave, occurred when crystalline solids were cooled to temperatures approaching or reaching absolute zero. This state was unstable, resulting in the shattering of any object that attained it into countless fragments.
During the Battle of Helska IV in 25 ABY, the ice planet Helska IV met its end when Shieldships were utilized to force it into the Mezzicanley Wave state.