That Word, which is the knife, is quick and powerful and sharper than a two edged sword. He gives us the Authority to walk in the blessing and receive the Promises of God as yes and amen.
You can use the Word as your weapon. Meditating on the Truth that GREATER IS HE that is in you than anything attached to this world.
I see your heart. However, in this dream someone gave you that knife, which I believe represents the “equipping” you to stand for your marriage. We can’t change the mind of our spouses but the Word sure can. We can pray Ephesians Chapter 1, that the eyes of her understanding be enlightened and that she would know the true hope of her calling to the covenant that was made. Also the Father in law. That no weapon formed against you all shall prosper. As for the soul ties, you may want to check out Brother Martins book about the Truth on Spiritual Warfare. I know that I struggled with “fighting” against a lot of things, the I was deceived into thinking couldn’t be simply severed by the Word.
Jesus is enough. And He is far Greater than absolutely anything.
Grace and Peace be multiplied to your family.