Polymorph Crystal
Not to be confused with its chaotic polymorph variant Chaotic Polymorph Crystal.
The Polymorfinenkivi (in-game name Polymorph Crystal) is a stationary crystal commonly found in the Temple of the Art, it should be approached with caution as it has a Polymorph Aura surrounding it.
Behavior
Polymorfinen kivi is completely stationary crystal with an aura surrounding it which will polymorph the player if they stay within it's reach for too long, transforming it's victim into a Lammas, Lentolammas, or Suhiseva lammas.
While attempting to destroy Polymorph Crystals, keeping out of their range and shooting from a distance is a good means to deal with it, utilising homing or other means to hit behind corners can be useful for destroying Polymorph Crystals in tricky locations, but teleport bolt can also be used to get in range to shoot it and escape before it's polymorph effect can afflict you.
When traversing the Temple of the Art, it should be worth paying close attention for any pink sparks in the darkness, as they should indicate a polymorph crystal is nearby.