How do I get to Elvira's shadow in the hallway

Hint 1 of 6:

There's a zombie in the way, right?  You'll need to get past him first

Hint 2 of 6:

The most effective weapon is a Turn Undead spell

Hint 3 of 6:

You'll need a brain (no, your own won't do; there's not enough there).

Hint 4 of 6:

There's a brain in a specimen jar in the basement of the house

Hint 5 of 6:

After all this, you discover that Elvira's shadow is only an illusion