The Jyok (ジョク Joku) are Aurum enemies introduced in Kid Icarus: Uprising. At first, they appear to be small invulnerable cubes, but they expand to form four poles that float in a cone-like shape. In this form, they fire lasers at Pit, and they become susceptible to attacks. They first appear during the aerial portion of the Mysterious Invaders chapter.
Jyok is made of four poles bound together by an electromagnetic beam. While it's normally invulnerable, it reveals its weak point when it opens its poles to fire homing lasers. Make sure you don't miss!