'Blood' in the Bible

in whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace,

But now in Christ Jesus you, the ones who once were far away, have become near by the blood of Christ.

because our struggle is not against blood and flesh, but against the rulers, against the authorities, against the world rulers of this darkness, against the spiritual [forces] of wickedness in the heavenly [places].