"I'll tell you what we know, but it isn't much," Arianwen began, ruefully. "We pulled the residue of Dolohov's Curse from where it ripped Ann's battlerobe in half. We knew it was a vicious curse to be able to do that sort of damage ... those robes should be able to absorb almost anything beneath the level of an Unforgivable, so this curse must be assumed to have comparable power ... a testament to the skill of the wizard who created it."