It can be a Shadow blast bomb seeing as both Shadow bombs in the game have really weird mechanics
it looks like a subwoofer and it's explosion special effect looks like a graphic equalizer. It makes a really weird electronic sound when it explodes and has a chance to strongly stun enemies.
It should be 3* to 5* and be available from Basil
The name of the weapon is... WAIT FOR IT...
"Wicked Bassdrop"!
"it's explosion special effect looks like a graphic equalizer. It makes a really weird electronic sound when it explodes"
Obi-wans face when he reads this: ....
~Sev