Disenchanter

Aw dang, I shouldn'ta given the PCs that staff; they're really screwing over my campaign. I'd better break out the big guns.

The Disenchanter is yet another creature in the category of silly creations by wizards, although this an also be classified as "silly things generals commission from silly wizards to fight other silly wizards". Like the Rust Monster, the Disenchanter is another creature in the DMs arsenal which can be (ab)used to take those uppity PCs down a peg.

At CR 17 (14 levels higher than the Rust Monster), with high AC and lots of hit points, it guarantees the destruction of a few magic items. It's a large, giraffe-like creature with a long sticky tongue it uses to grab objects from a character and begin draining the enchantments out of them, turning them into relatively useless mundane objects. It feeds on the drained magic.

The Disenchanter literally exists only to take away the characters' toys. Let me read from the Fiend Folio to you: "The Disenchanter ignores individuals who do not radiate magic and lopes away if there's no food to be found, even if it's attacked."

So a Disenchanter attacks the party. Staff of sphere of annihilation? Well, now it's a stick. And your +5 ring of protection is now a regular gaudy ring. Also your potions are now water. And now the Disenchanter's walked away. Wow, that sucked. I guess you guys shoulda rolled higher on your Spot checks, huh.