Castlevania 2 Walkthrough: Braham Mansion - Dracula's Eye
Map of Braham Mansion

Go straight until you hit the wall and go up the stairs, then the next two. Then go left and go up two more stairs.

Go right, go up two more stairs and go right until the screen changes.

Eliminate the two gargoyles and go down. You can throw sacred flames at the armored guard to kill him. If you wish, there is a hint on the right explaining that you will have to kneel before Deborah Cliff and wait for the spirit.

Go left and buy the oak stake from the merchant then go all the way down and go right. Then cross the small room with the three bats.

Death is right in front of you. To defeat the Grim Reaper, a simple but effective technique is to constantly throw the sacred flame.

While it may not make the fight exciting or epic, this technique will (fairly quickly) overcome the Grim Reaper, who will leave the Silver Dagger in his smoking ashes.

Just to the right, in the old cell, you will find as usual a sphere that will leave a bag once destroyed with the oak stake. This bag contains Dracula's Eye.

Go up the stairs, go left and go back down to exit from where you entered. If you can afford it, buy a stake again. In the next mansion, it will save you a big detour.

With the eye in his pocket, Simon continues the adventure.