The concept of this monster came up in a particularly silly moment in last weekend's Dread game. I decided to state it out for Labyrinth Lord, et al.
Also, I am a grumpy curmudgeon who thinks that modern stupid music and dancing isn't as cool as the stupid music and dancing I did in my 20s. Kids these days...
Banshee, Dubstep (Dub Sidhe)
No. Enc.: 1
Movement: 150' (50')
Armor Class: 2
Hit Dice: 6***
Hoard Class: XIV
These rare, incorporeal undead appear as young elves in tattered clothing wearing smoked glass lenses over their eyes and glowing bracelets on their wrists.
The Dub Sidhe is naturally ethereal. Only magic and weapons of at least +1 enchantment can hurt it. In combat, the monster will attack with a loud screeching attack of distorted trebles and thundering bass. Every character within 30' of the Dub Sidhe must save vs. dragon breath or take 2d6 damage. A successful save will reduce this damage by half.
Once per day, the Dub Sidhe can produce a crazy “song” of wobbling madness and strange rhythms. Any creature within 60' of the spirit must save vs. spells. Those who fail are compelled to dance stupidly for 2d6 rounds. While dancing, the character cannot attack of cast spells and suffers +4 penalty to their AC. Additionally, the character suffers 1d4 points of damage each round of dancing due to pure exhaustion and throbbing bass. Killing the Dub Sidhe will end this dance prematurely.
A character who dies from the Dub Sidhe's dance will rise up the next night as a new, fully independent Dub Sidhe.