Not much is known about the Blood of Jesus today by Christians but it is a mighty arsenal weapon against the devil. There is life in the Blood of Jesus and none is in Satan. He is called Beelzebub, being interpreted; the lord of flies. Flies are attracted to dead things but the Blood of Jesus has life in it so the devil is repelled by it and cannot penetrate it.
Many years ago, the word of God was revealed saying, "Make much of the Blood and the Blood will make much of you." For a while, Christians did make much of the Blood and as a result, many signs and wonders were seen. However, today there is not much that is said about the Blood. Has it lost its power? Certainly not, but we have lost knowledge of it and therefore, we haven't seen mighty acts of God as did the early disciples. But the time has come and now is for us to make full usage of this powerful weapon that God has given us.
God's word does not change. What He said years ago, applies to us today and He said, "Make much of the Blood and the Blood will make much of you."