It was like 10 yrs ago that I saw a two part (I think) movie.It had characters similar to “the wizard of oz” but the girl had a sister.They had magic the “thing” in the movie was that when they hold hands some sort of magic prevents them from harm.Of the two the younger one was the main character and the older one was possessed by an old lady.They one day dot inside a cave and blow up a wall and there was that lady.She (like I said) possessed the older one and put a spider mark on her neck. There was also a sceene where the younger one gets put in a coffin that’s closed with screws but she just waves her finger and the screws fall out>I don’t remember the rest but I hope that was enough clues to help me find the movie that I tried so hard to remeber.