That is so glaringly unscriptural as to be blasphemous. How can the RCC seriously say it wrote the Bible and teach doctrines that are so contrary to it?
Romans 6:9-10 For we know that since Christ was raised from the dead, he cannot die again; death no longer has mastery over him. The death he died, he died to sin once for all; but the life he lives, he lives to God.
Hebrews 7:26-28 Such a high priest meets our need—one who is holy, blameless, pure, set apart from sinners, exalted above the heavens. Unlike the other high priests, he does not need to offer sacrifices day after day, first for his own sins, and then for the sins of the people. He sacrificed for their sins once for all when he offered himself. For the law appoints as high priests men who are weak; but the oath, which came after the law, appointed the Son, who has been made perfect forever.
Hebrews 9:24-27 For Christ did not enter a man-made sanctuary that was only a copy of the true one; he entered heaven itself, now to appear for us in God's presence. Nor did he enter heaven to offer himself again and again, the way the high priest enters the Most Holy Place every year with blood that is not his own. Then Christ would have had to suffer many times since the creation of the world. But now he has appeared once for all at the end of the ages to do away with sin by the sacrifice of himself. Just as man is destined to die once, and after that to face judgment, so Christ was sacrificed once to take away the sins of many people; and he will appear a second time, not to bear sin, but to bring salvation to those who are waiting for him.
The Holy Spirit is our pledge of future glory.
II Corinthians 1:21-23 21Now it is God who makes both us and you stand firm in Christ. He anointed us, 22set his seal of ownership on us, and put his Spirit in our hearts as a deposit, guaranteeing what is to come.
In fact, it would be hard to be more scriptural.
But let's be crystal clear: the "Eucharistic sacrifice" is one and the same sacrifice as Calvary. It is not a new sacrifice. It is not another sacrifice. Jesus does not suffer or die again.
Christ's sacrifice is eternally present to the Father in heaven. If you don't believe that, I suggest you reread Hebrews 9 and 10, particularly in light of the Yom Kippur narrative in Leviticus 16.
The sacrifice in Leviticus does not end with the death of the victim. None of the OT sacrifices do. The victim must be offered by the priest -- on Yom Kippur (and only then) the victim's blood is sprinkled in the Holy of Holies by the High Priest -- and, in many cases, the priest and the person for whom the sacrifice is offered must eat the sacrificial victim.
Hebrews makes it crystal clear that Christ is now in the heavenly Holy of Holies offering his blood to the Father on our behalf, so it's crystal clear that his sacrifice did not end on Calvary. (We don't even need to add that heaven is outside of time, and all moments are present eternally to God anyway.) This is why Christ appears in Revelation 5:6 as a Lamb standing "as though it had been slain".
It is precisely this sacrifice that is made present to us in the Mass. In the Mass we are -- spiritually -- at the foot of the cross, and in the heavenly Holy of Holies with Jesus the High Priest.
This is why Hebrews 13 has the interesting aside that "we have an altar from which those who serve the [Jewish] Tabernacle have no right to eat".
That automatically tells you two things: Christians offer a sacrifice (that's what an altar is, a table for sacrifice), and they eat of it.
Amen!