Here is a link to understanding the ‘shedding of blood for sin’....The Passover Lamb. On the left is the Old Testament and on the right is the explanation of Jesus as the New Testament ‘Passover Lamb’. If you study this, you should understand the purpose of the CROSS, AND THE SHEDDING OF JESUS BLOOD AND What COMMUNION represents.
http://endtimepilgrim.org/passover.htm
Indeed. Communion or the Lord’s Supper is a remembrance of an actual one time for all sacrifice. So why do you keep inferring that literal blood is in the cup and the bread is literal flesh?