Trying to remember this anime i watched like 1-2 yrs ago.?

It was kinda weird.I mean they were looking for the "Book of the Dead"/"Necronomicon".Well they found it.It turned out to be a Dagger/Short Sword.Well they are attacked by weird monsters,her friend dies she uses "The Book/Dagger of the Dead" on him and he comes back to life.Then he has these powers (something to do with his bones become weapons).Then he runs into his friends and they have weird powers too and fights/kills them.Changed computers and forgot about this anime because they only had it subbed up to eps. 20 and was like that for a while.Not much info but I know someone will know the anime. P.S. Thank You in Advance.