Magatama Idol Kaguya explains:
"Release the arrows of thunder with this Magatama! It'll crack the air asunder, and leave everything popping and zapping! Take this! And that! And another! Umm...you saw all that?"
Due to the easy way to craft this Magatama, its primary use is often being Dissolved for a decent return of its materials (Jiggling Meat), and a fair amount of Miracle Stones, Fortitude Stones, Cutting Stones and sometimes one Piercing Stone.