Castlevania 2 Walkthrough: Laruba Mansion - Dracula's Ring
Map of Laruba Mansion

Go to the right and climb the first staircase you encounter. Walk to the left, take the stairs, and head back to the right.

Do not take the staircase that goes down and continue to the right. After the screen change, climb the stairs right in front of you and go a little further to the right to buy the oak stake.

Once the stake is in your possession, turn back and go down as low as possible.

At the very bottom, a man will give you some laurels. If you wish, you can use a branch of it to cross the spikes on the right because it's not necessarily easy with the moving platforms. A little further to the right, you will change screens to arrive at the boss.

The boss is named Carmilla or Vampira. She is very simple. Stay still while equipping the bone to counter her series of tears turning into fireballs. Once the storm has passed, stay at a distance so she doesn't touch you while making her circles and hit her when she passes within range. Repeat the operation, and you obtain the magic cross upon her destruction.

In the old dungeons, use the oak stake for the last time on the sphere sealing the bag containing Dracula's ring, the fifth and final element.

Exit the dungeon by the path you came in (no description, I've already chewed the work enough for you).

Simon has retrieved the ring and now possesses all 5 parts of Dracula. He then takes the road toward the ruins of Castlevania.