Aside from it being the ultimate Rick Roll, it’s likely just Hive magic in the form of a song. Similar to a type of poison. I’m guessing it’s the type of sound that makes you do a shit. In fact, it’s the right kind of sound that can make a person shit their whole selves. Technically anyone could sing it, but weather or not it’d have the desired affect would most likely depend on the singer’s skill in Hive magic. It appears to need multiple Hive Wizards in a sort of choir. [spoiler]”Four trillions souls were about their days and nights as an unknown melody caught the breeze. It was beautiful—an ethereal gift and the end of all things. The Choir sang. Only twenty strong. As their voices grew in volume, the people started to scream. The planet's crust shifted and cracked. The seas roiled and spilled out over the land. The core shook. The ground shattered. Defenses scrambled. It was too late. Less than an hour after the Song began, the hidden homeworld of a forgotten people split in twain. These are the Song's powers, its gifts—anti-life and oblivion.” -Inquisition of the Damned IX.II The Unmaking[/spoiler] It kills by making a planet shit it’s whole self, therefore my theory is correct. If I or any other guardian were to sing it, little- if anything- would happen. Don’t worry, pal. You can keep singing it in the shower. We all do it from time to time. No shame in admitting to it.