You can’t kill a person who is willing to die to themselves or discard their character if needed. If you do enough Inner Alchemy, the person the curses were attached to ceases to exist anymore, and with him, the spells.
One thing few realize is that people curse fictional characters mostly; spooks that live rent-free in their heads. You can’t kill Anima Noira, because Anima Noira is not real. She is just a specter made out of your own lust, petty vengeance, envy, and jealousy.
Purge yourself of those things – if you truly want to kill me.