"Eventually, I managed to do it. My curse was weaker, and shorter than hers and I took some measure of solace in that I spared them her wand. It didn’t often save me, though. Aunt Bella believes pain makes your dark magic more powerful. Rodolphus uses C rucio  on her during sex. Apparently, she can’t finish without it. She told me that gem while she demonstrated the Transmogrified Torture on me. 