The Tale of Two Wolves

I might have missed something but I recall them saying in the originals that the hollow would need to be transferred into a powerful supernatural creature. Could Alaric' twins have siphoned it and placed it in aurora and then killed her, instead of letting klaus die with the hollow?

In A Tale of Two Wolves, they made it seem like a White Oak stake was the only thing that could kill an Original. However, if they coated a regular stake with Marcel's Upgraded venom, could that have killed Klaus as well?

In s1 e10, I think, of Legacies, Lizzie meets a genie (jenni or whatever she calls herself lol) and ends up seeing a couple of alternate realities, all of which revolving around Hope. Well, in one of them, Hope is shown feeding on multiple people, some even decapitated. Now, she looks super cool and all in this, because we haven’t seen her with her vampire side yet. Question is, how exactly does she do this? Unlock her vampire side? Would she have to drink another vampire’s blood, or just die and come back to life? In TO, she does die for a short amount of time and comes back, and never unlocked her vampire side. So, I’m a bit confused on how she would be able to unlock it. Side-note: I think it would be cool if her third side were to be unlocked in Legacies as well.