Complex sentence: As the level of her weapon increases, her weapon changes in shape as if it were surrounded by ice crystals, such that the crystals form zigzagging crystals that form into a long rod.
Split into simpler sentences: As the level of her weapon increases, it is noticeable that her weapon changes in shape as if it was surrounded by ice crystals. Such that the crystals form zigzagging crystals that form into a long rod.