That was no answer. In the first place, at the last supper Christ had not shed His blood yet and both He and the apostles were bound by the law. If hey had eaten real physical blood as the Catholics claim they would have been sinning.
As I said... broken record. God bless.
Jesus is eternal as is His sacrifice. The Last Supper was necessary so that He could show the Apostles how He could indeed give His flesh and blood for us to eat and drink.
This was so important that when He called and revealed Himself to St. Paul, He gave to Paul the exact words that He used at the Last Supper.
Christ’s blood is the ocean of God’s mercy which is endless and fathomless.
The same God that created the universe and all that is in it, who overshadowed a virgin and by so doing created the Son of God and Son of Man, is certainly capable of anything.
We in our humanity cannot understand the how, but we respond as the Apostles did when Jesus asked if they too would leave Him. “To whom shall we go, Lord. We believe that you are the Christ. You have the words of eternal life.”