Sonic Arrows

Sonic Arrows are gifts to the Apollo cabin members from their father, Apollo.

The Last Olympian
Micheal Yew, the leader of the Apollo Cabin at the time, used sonic arrows against Kronos' army on the Williamsburg Bridge in the Battle of Manhattan. He fired it at the front lines and it made a screeching sound until it landed, sending a blast wave of sound that caused cars to explode and monsters to run around with their hands over their ears, except the monsters that were instantly turned to dust. Michael mentioned that the sonic arrows were given as a gift to him by his dad, Apollo.

Appearance
During the Battle of Manhattan, it it inferred that the arrows look like normal arrows. However, these arrows emit sound that only the enemies could hear.

Usage
Sonic arrows make a screaming noise as they are shot and when they land, they unleash a loud blast. Percy Jackson describes it as sounding like a power chord on an electric guitar, magnified through the world's largest speakers. They are very useful in battle, because besides killing or maiming enemies, they also confuse them. However, they are not always lethal. It is used only by Michael Yew so far. They can only kill weaker monsters, other monsters and half-bloods are just stunned.