Slifer,obolisk,and ra and other cards that were tributes can be destroyed by dark hole,blast held by a tribute raw bangering,nightmare wheel,or rakiki break regardless of the effect it affects any monster including an Egyptian God card.
Example of deck. Wait until she set blast held. When u have quill, exchange and dragon, use quill to return blast held to her hand, activate exchange and take his blast. Surely she will pick dragon. Set the trap and once she attack, activate it. Repeat one more time and you done.