The Siren's Song is a craftable Hardmode magic weapon that can be can also be dropped by the Siren and Leviathan during Hardmode. It fires treble clefs in random directions within about 30 degrees of the cursor. The clefs pass through blocks and inflict the Confused debuff on hit.
The projectiles travel at moderate velocity when fired and gradually slow down as they move before coming to a stop and hovering in mid-air for a substantial amount of time before despawning. They can pass through blocks and cannot pierce enemies while in motion. However, they become capable of inflicting extremely rapid damage on enemies that touch or pass through them when they have stopped moving.
Its best modifier is Mythical.