The blood of Lamb speaks volumes

"The scriptures teach us that life resides within the blood, and it carries an authoritative voice. Leviticus 17:11 states, 'For the life of the flesh is in the blood.' Additionally, Hebrews 12:24 speaks of 'Jesus the mediator of a new covenant, and to the sprinkled blood that speaks a better word than the blood of Abel.' With both vertical and horizontal legal significance, the blood grants access to both heavenly and physical realms. Hebrews 10:19 affirms this, stating, 'Therefore, brothers and sisters, since we have confidence to enter the Most Holy Place by the blood of Jesus.'"

Access to God:

Hebrews 10:19 - "Therefore, brothers and sisters, since we have confidence to enter the Most Holy Place by the blood of Jesus."

2 Chronicles 30:

Vs 16 And they stood in their place after their manner, according to the law of Moses the man of God: the priests sprinkled the blood, which they received from the hand of the Levites.

Vs 19 He who prepares his heart to seek God, the LORD God of his fathers, even if he is not cleansed according to the purification of the sanctuary.

Vs 20 And the LORD listened to Hezekiah and healed the people.

Access to Angelic beings and principalities:

Revelation 12:11 - "They triumphed over him by the blood of the Lamb and by the word of their testimony; they did not love their lives so much as to shrink from death."

Access to Human beings:

1 John 1:7 - "But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin."

Access to Elements of nature:

Exodus 12:23 And Jehovah will pass through to strike Egypt. And He will see the blood on the upper doorpost and on the two side doorposts, and Jehovah will pass over the door. And He will not allow the destroyer to come into your houses to strike you.

Hebrews 11:28 By faith he made the Passover, and the sprinkling of blood, that the destroyer of the first-born might not touch them.