Lutherans believe in con substantiation .. .the bread is the bread,it remains bread but Christ is present along side the bread..
Orthodox are semi-pelagian and hold to many of Romes teaching ... ..
Not all Anglicans hold to "real presence" it depends on the branch ... any church that re-sacrifies Christ is heretical and blasphemers
1 Cor 11:27 is Paul's warning to the believers at Corinth that taking the communion REMEBRANCE of bread and wine unworthily makes the one guilty of the body and blood of Jesus. This warning only is understood by the GENTILE believers at Corinth because Paul would have taught them the Levitical laws, which include Lev 3:17.
In the Upper Room discourse, Jesus instituted a REMEBRANCE of what He was about to do with His Body and Blood at Calvary. By partaking of the bread and wine IN REMEMBRANCE of His sacrifice, the partaker connects spiritually to the SPIRIT LIFE Jesus came to offer to those who will believe in Him, not eat Him, believe in Him.
God's Life does not, repeat DOES NOT, get into the believer via the gastric system. That Life is Spirit and is ONLY placed into the believer by God's Spirit, not a human priest holding up a 'transubstantiated wafer'. God's Life is Holy Spirit Life as the earnest of our inheritance, our inheritance of adoption into God's family headed by Christ. God puts THAT LIFE spark into the believer at the moment they believe in Jesus as Savior and Lord.
The Corinthian believers had a History they would know of eating the food sacrificed to idols and in eating the food they were told to believe they ingested their idol's life into them. Paul would have taught these previous idol worshippers that God has condemned the cannibalizing of the blood of the creature, for the Life of the creature is in the blood of the creature ... the creature life is in the blood, and when Cain slew his brother and shed his blood upon the Earth, the curse went to the earth. That curse would heap up in those who would drink the blood of any creature offered to God.
Paul used that lesson to warn the Corinthians that if they brought enmity to the communion REMEBRANCE of what Jesus accomplished on the Cross then they would not receive the spirit life conveyed through the remembrance (not the idol worship eating of the idol god), instead they would be guilty of violating the law in Leviticus 3:17, spiritually heaping upon themselves not Spirit life but condemnation for cannibalizing the creature life in the blood.
Without the shedding of blood there is no remission of sin. So Jesus shed His blood ONCE for ALL Forever at Calvary. His blood had no fallen nature, so His creature life in His blood was the pure sacrifice for the laws of sin and death. That blood is not ingested to receive God's Life in us. It has already been applied to the intended purpose. To even imagine one eats God's divinity and soul in a wafer is blasphemy, at once heaping condemnation for cannibalism upon the soul of the offender.