Board Thread:General Discussion/@comment-28617512-20160601071022/@comment-25926288-20160601110327

Welcome to the fandom, lol.

1) The sword has the power to snuff out the light or dark through complicated spell. But apparently Hook figured that he could simply absorb all the "Darkness" into Excalibur for some reason. (One of the things you'll have to get use to is that somethings just happen because the writers say so). Emma had this big old spell, but it was never used and Hook randomly used what I assumed would be it without any effort. So, yes, it sucks out all the dark magic because the plot says so. You would think that Emma could have done this instead of sneaking around.

2) Her plan was first to channel all the dark magic and put it into Zelena and kill her. After speaking with the others and Dark Hook around, she decided that she'll sacrifice herself. The Dark magic can't necessarily be destroyed but it wouldn't be easily accessible. (Goes wherever all magic goes off to, lol.) I assume she meant that it would be absorbed into the sword and then she'd kill herself, destroying the whole Excalibur and it'll be technically gone forever.

In brevity, she'd destroy the dark magic and the source of that magic at the same time, meaning it'll be gone.

3) Only those with unfinished business go to the Underworld. It's not at all easy to rescue anyone from the Underworld because:

1. if you somehow just steal them away to the world above, they'd be sucked back down because they can't exist in the world of the living for long. That's why the Dark One spirits had to find someone to take their place.

2. The only way down there is to open a portal with the blood of someone ressurected, which isn't common.

3. You'd somehow have to survive everything down there to get out.

4) Emma was the Dark One. So, yes, she was dark, just not evil.