The Terrifying Basking Shark!
[You have been attacked by a Basking Shark!]
The last thing that Sebastian saw from his system notification was this, then his consciousness directly shut down. The melody-less sound blast was so powerful that his inner ears seemed to have ruptured from the sound.
Boom!
The sound drummed like thunder, echoing to hundreds of kilometers in seconds as both the 21 sharks and every other creature on the path of the sonic blast fell into a moment of unconsciousness.
Of course, it was only the stronger creatures that felt this. Most of the white tier creatures with low tier bloodlines all exploded into a bloody mist immediately after coming into contact with the sound waves.
About a second later, Sebastian became the first shark to open his eyes, recovering from the immobilizing effects of this sharp sonic attack.