Nibelheim

Head north until you come to Nibelheim. Check each of the houses and the inn for the black caped men. Talk to them to recieve 2 Luck Sources, Elixir, Turbo Ether, and a Platinum Fist.

Go into the mansion to the north of the buildings. Go into the right hand door and into the room to find a Silver M-phone. Back out, up, and right takes you to another room where you'll get a Twin Viper.

Go upstairs and left to find a chest with an Enemy Launcher in it. The room just to the right and up has a locked safe in it (the instructions for opening it are below). Go back and go to the right and up to find a chest with a Magic Source in it.

Opening the locked safe (Optional): In the room to the left of the entrance is a note with a letter. Reading it gives you 4 clues to the combination for opening the safe upstairs:

1.The lid of the box with the most oxygen.
2.Behind the Ivory's short of tea and ray.
3.The creek in the floor near the chair... then to the left 5 steps, up nine steps, left two steps, and up six steps.
(invisible)The fourth row is written in invisible ink... Dial (4) is (Right 97).

For clue 1, check the lid of the box upstairs in the room with the plants.
For clue 2, check behind the piano in the big room downstairs.
For clue 3, start from the chair in the lower right room upstairs and follow the steps. You'll end up in the hallway just before the doorway to the upper room.
For clue 4, it just tells you.
Putting it all together, the full combination is: Right 36, Left 10, Right 59, Right 97. The combination must be entered within 20 seconds without going past any of the numbers. As soon as the safe opens you are attacked by Lost Number. Check the safe afterwards to find the Odin and the Basement Key.

Head down the spiral stairs to the basement. If you got the key, you'll be able to open the door on the way to the library and talk to Vincent. In the library, you'll meet Sephiroth who will tell you that he's going north, to Mt. Nibel. Pick up the Destruct he leaves behind then leave the mansion and head north.

Obtain: Enemies: