Mystic Square

The Mystic Square is a rare polygon that resembles a Square but is a deep purple color. The only other known "mystic" entity in the game is the Mystic Smasher, which also uses the same purple color.

It is not known how these squares interacted with the Underseer branch, if at all.

mystic polygons can come in pentagons, and they teleport around, just like the mystic smasher when damaged. It is unknown if other mystic shapes exist.