Meh, I'm rapidly losing interest in this plotline. Angsty Stefan is fun, and the Roaring 20s costumes are nice, but Klaus and his sister, and all the penny-ante scheming and counter-scheming, snore. Now the gang is going to have to fight over a necklace, right? Get the necklace, get the witch, get the werewolf hybrids...is this a TV show or a video game?
The best plan they could come up with was to have Damon die? What they need to do is find a way to kill Klaus. That is the ONLY way to save Stefan.
They don't need to find a way to kill Klaus. That implies that the way to kill Klaus is a huge secret. They just need to use common sense.
Any newborn vampire could take Klaus out with ease.
Step 1) Compel your way into the nearest national guard armory.
Step 2) Borrow a Ma Deuce, or something bigger if available. An autocannon would be great. A Mk. 19 grenade machine gun would be perfect. With a vampire's strength, it is perfectly feasable to fire a crew-served weapon from the shoulder.
Step 3) Turn Klaus into confetti. He's fast as hell, but he's not a bullet-timer. His flesh can be pierced and torn, he's just got amazing regen. Machine guns that size don't leave much more than bite-sized chunks. It's hard to recover from that, even with magical immortality.
Step 4) If he starts to regenerate, bury his remains in a thousand tons of cement so that he'll never he be able to claw his way out.
And if that doesn't work there are always tactical nuclear weapons to fall back on. Also, they're not difficult to steal when you have vampire mind control powers.
See now this is the kind of thinking that could really enliven this show. Why haven't any vampires tried to mind-control their way into the Oval Office and use the POTUS as a pawn in their schemes, if only for fun? Give the Tea Party something to complain about!
Any group of immortal mind-controlling people should be running all major corporations and governments by now. They just need to stop killing each other like morons. What's the point? And Klaus' scheme to create a few werewolf hybrids, pffft. Talk about thinking small! He could have whole nations and armies at his command if he'd been putting some effort into it for the last millenia.