Midas was right. Helga really wanted to kill Midas at that moment, but she couldn't anymore even if she wanted to. Actually, now that Midas had taken away the items she had, she couldn't even sever their connection the way she had with her Clan Totem before.
The talisman she had used was something she had kept a secret from everyone in case she ever got into a Soul Contract she could not honour. She could always use the Soul Severance Talisman to sever the connection between the contract and her Soul in exchange for dealing with some damage to her soul.
It was a worthy sacrifice for her, something she would willingly do at any time, especially if she was in a situation where it would benefit her to get out…