What a great chapter, a second prophecy, no wonder Harry bang it on the table.
So Harry is going under a Cleansing Ritual, which will rid Harry from the Dark Magic in him. If it's conneted to Voldemort then fine, but I do think that the Dark Arts will help Harry in defeating Voldemort.
Cool the Cleansing Ritual hurt Voldemort in more ways then one. I like to give the Order and Death Eaters the Run around.