The Immortality Spell

When Esther created the Original Vampires, we know that she added to the spell a mystical bond that would kill all the vampires created by the Originals if any of them died. The thing is, this link is a separate spell from Esther's Immortality Spell, or is intrinsically part of the Spell?

And if it's part of the Immortality Spell, does that mean that Alaric also had a Sireline Link to whom he transformed? And Marcel too?

We know vampires can be turned into humans without the cure if a witch have enough power to do so(The Immortality Reversal spell) but my question falls into, does this spell prevent the person to turn back into vampires similar to what the cure does? and if it was possible once it turns back into vampire does it count as a young vampire or an old vampire?

For example lets per say Elijah or Klaus went through the spell and they were reverted back to human and then Freya performs the Vampire spell (The modfied immortality spell) would they count once more as "Old ones" or would they count as newly turned vampires? like would their strength go back to zero years instead of 1000 years worth of strength?

I think the question is pretty straight forward. The two instances that we have seen an variation of the Vampire Spell (I'm aware isn't called like that but is easier to make the distinction) it has always been around of the White Oak. Lucien created the Upgraded Original Vampire with a white oak bullet and Freya's blood, Esther made the Enhanced Original with the help of the white oak stake and Elena's Blood. So it seem it is always need the White Oak but humor me here, what if there was an Original Vampire who wasn't created with white oak? that would make Vervain and White Oak basically useless against it.

Idk i think it would make totally sense if something like that happened on Legacies or at least explained that is possible

Hey guys, I’m new to this app and I am currently on my first watch through of Legacies since I’ve only recently been able to find a platform to watch it. Anyway, my question is, since we know that the spell used to create Malivore was performed by a witch, a vampire and a werewolf then that must mean the Mikaelsons were alive during the times that the Malivore monsters wandered and wreaked havoc on the world, since they are the original vampires. Which means the way the originals story was told about their origin as vampires could be totally different, the whole past of the vampire diaries universe could be different from the way it was told, but no one would remember since Malivore wipes the monsters from the collective memory. Sorry for rambling on but since I started thinking about this theory I haven’t been able to stop, for example, what if it wasn’t a werewolf that Niklaus and Henrik sneaked out to watch the night Henrik died, what if it was a dragon? Or some other monster. Thank you for reading and please feel free to leave any comments or questions or theories you have in the comments!

If Sybil wanted to get rid of Cade's slavery and drink Qetsiyah's elixir, would she become more powerful than him - getting rid of him forever? and even death since he probably cannot kill or drag the soul of a true immortal? if Sybil's immortality and psychic mermaid skills were unified with those of the immortal when drinking the elixir? or was Cade going to undo her pact and was she just an ordinary immortal like Silas?

Hey guys, I know it has been awhile but these past few days, I’ve started rewatching TVD from the beginning and now I’m on season 5, and it got me thinking, how did Qethsiyah make that immortality spell? Since it was never explained in the show, how do guys think she did it?

Would really love to hear your thoughts and ideas about it.