How do I kill Dracula

Hint 1 of 7:

Visit the basement room until the coffin is closed.

Hint 2 of 7:

You do have the two needed tools, right?

Hint 3 of 7:

The mallet is in a hole in a tree. (It looks too high, but it's OK.)

Hint 4 of 7:

The stake is lying at the base of a tree.

Hint 5 of 7:

Timing is important here.

Hint 6 of 7:

Pop the lid open, and use the mallet and stake right away.