•It is not a myth. In the spell grimoire I think right there that it will kill any demon who uses it on a original. Secondly, Katherine seem to know about it and still did not tell Damon.

•It cannot kill an Original because only the whiteoak stake can accomplish it and nothing else. Even the case of a witch having the power of a 100 witches killing an Original is false.

•Elijah came up with that plan and stated that Klaus would be highly vulnerable during the transition. This was Klaus in “transition” and still Bonnie could not do it without dying. So Elijah had her deliver Klaus to the brink of death so then he can finish Klaus by ripping his heart. This is what is onscreen. Immediately after the transition Klaus clearly tells Elijah that no one else can kill him again not even Elijah.

•As matter of fact Esther channeled the entire Bennett Bloodline living and dead, channeled Earth Magic and Celestial body yet it was still not powerful enough to merely cast the spell to make them mortal. What is power of a hundred witches? Individually we know only Esther holds such power. Qetsiyah herself holds the power of a celestial event in an ounce of her liquified blood let alone her been fully channeled. Sheila Bennet was able to create a supernatural planet as a prison for Kai known as prison world.