The darts of such a spell were described to be "streaking shafts of azure radiance". They would fly towards an opponent, and pain them greatly.
In 1372 DR, Pharaun Mizzrym often used such a spell. Favoring the ability to eschew with material components and still cast a relatively potent spell, it saved his life on more than one occasion. He tried to use the spell against Syrzan, but it failed, and the bolts stopped into the air. They then fell to the ground and turned into blobs that skittered towards a pool.