Yeah, it's a great song. I don't know what you meant by the title, but it's a great song.
Play that on guitar? It's simple improv in...either Ab or Bb with D, can't remember, haven't played the Organ part in a while. I don't play much Opeth, I listen more.
As he was typing the title, he was probably thinking "Epilogue is such a good song" and "Epilogue is so good," and, as a result, the monstrosity that is this thread's title was created. I do it all the time.
Yeah, it's an awesome song, I love it. It's not all too bad to play once you can get your hands around the fretboard... quite fun. And the chords are something like Bm, G, Em, Bm, A... or something along those lines.