In him we have redemption through his blood, the forgiveness of our trespasses, according to the riches of his grace, (Ephesians 1:7, ESV)
I have always read this part of Ephesians as referring to Christ’s blood causing the redemption of believers. However, the primary agent in the longer passage is the Father.
If a priest slaughters a lamb and then sprinkles its blood on items to purify them, the blood had belonged to the lamb, but now the lamb is dead. The blood is now the property of the priest, who then makes use of it. So the Father would seem to be the one applying Christ’s blood to believers to make them holy. That makes it now the Father’s blood, which Christ offered to him by consenting to be sacrificed.
Of course this becomes confusing because Jesus is both the sacrificial lamb and the “High Priest forever, in the order of Melchizedek”. That would have Jesus both offering his blood in sacrifice and also being the one to sprinkle it as priest.
This all leaves me confused. Is the “his blood” a reference to Christ (whose blood it was) or to the Father (whose blood it has become)?