"It will have blood they say: blood will have blood"

Has to link to  Act 3, scene 4 and the keywords for this scene being BANQUO'S GHOST.

Use the following mnemonic to link the quote to the keyword for this scene and therefore help you remember which scene this quote is in:

Imagine 'It' is taking blood. 'It' will have blood. But when he pulls back his hair it's Banquo's ghost.