Queen Violetta
 

I'm here in my quest. I have no idea where to go. I've reached the demon place but everything is very strong.

And the obelisk should all be lit now ? (missing 2)

Also the quest to unfreeze the castle, any clue where that is ?

I am not sure, but I would say that when you are in land of elves - you should be able to tack all obelisks, right?
For the pitty queen - well, some guy named Korador has some funny black thingy, find him, kick his ass and smash that little thingy in pieces, there you go.

Yeah, like Gatts said, your next stop is the Undead World. The entrance is in the first elven location, click on the book.

Where is the entrance to the elven place ?

You have to sail there. Talk to the same guy, who carries you to the Islands of Freedom.

cheers mate

Beware, Karador ain't a small little guy, he's one of the toughest (he's in a castle, not a troop)...