Calder's Crippling Contraption

You throw a mithril spear to a place within range. From it erupts a magical construct with a devastating voice box. Any enemy creature within 300ft of the contraption can hear a horrid crippling scream and are deafened. All affected creatures have disadvantage on any concentration checks to maintain a spell. Allies and other deemed to be unaffected, only hear their favorite tune emanating from the contraption. All enemy creatures who hear the scream must make an Intelligence saving throw. On a failure they take 3d10 psychic damage and become vulnerable to one damage type (your choice for each individual creature). On a success they take half as much damage and suffer no other ill effects. At the start of each creature's turn, they must make the save again, repeating the process as long as the contraption remains. All contracted Vulnerabilities last for the duration of the spell, or until the contraption is destroyed.

The contraption remains for the duration but can be destroyed. It has 200 hitpoints and an AC of 18. It is immune to all conditions, and is immune to psychic and poison damage. When any creature who has a vulnerability damages the contraption, they take 3d10 damage. The damage being of a type in which they are vulnerable.