It's Christmas, so Queen Slug-for-a-Butt decides to kidnap Santa Clause and brainwash him to be evil and join her in her attempt to take over the world.
Did You Know?
A-ha! I knew it - the criminal mastermind behind all of this is none other than... Santa Claus! I knew he couldn't be trusted. Always going down people's chimneys. And those elves - does he pay them, or are they... SLAVES to his evil will? Then again, perhaps Santa is just the cherry-nosed personification of holiday spirit.
References The Seventh Seal