Pope Saint Pius V proves that the Novus Ordo is invalid, and is therefore idolatry. This is from Patrick Henry Omlor:
No "Mystery of Faith" : No Mass IV. The Powerful Backing Of De Defectibus18. There is yet another most weighty authority supporting our position that the entire form for the wine consecration is required for validity. De Defectibus in Celebratione Missarum Occurrentibus (abbr. as "De Defectibus") is a section of the official rubrics for the celebration of Holy Mass, and it is to be found printed among the introductory pages of all legitimate (ante-NOM) altar missals.
19. In Part V of De Defectibus we read: "Verba autem Consecrationis, quae sunt forma hujus Sacramenti, sunt haec: 'Hoc est enim Corpus meum.' Et: 'Hic est enim Calix Sanguinis mei, novi et aeterni testamenti: mysterium fidei, qui pro vobis et pro multis effundetur in remissionem peccatorum.' Si quis autem aliquid diminueret, vel immutaret de forma consecrationis Corporis et Sanguinis, et in ipsa verborum immutatione verba idem non significarent,
non conficeret Sacramentum. Si vero aliquid adderet, quod significationem non mutaret, conficeret quidem, sed gravissime peccaret."
20. The English version of this reads: "The words of Consecration, which are the form of this Sacrament, are these: For this is my Body. And: For this is the Chalice of my Blood, of the new and eternal testament: the mystery of faith, which shall be shed for you and for many unto the remission of sins. Now if one were to omit, or to change anything in the form of the consecration of the Body and Blood, and in that very change of the words the [new] wording would fail to mean the same thing, he would not consecrate the Sacrament. If in fact he were to add something that did not change the meaning, it is true he would consecrate, but he would sin most gravely."
21. Could anything be clearer? Anything more incapable of being misunderstood? It begins by saying "The words of Consecration, which are the form of this Sacrament, are these:" Then the entire form, both for the Consecration of the Body and of the Blood -- including, of course, the words "the mystery of faith" -- is set down precisely.
22.
Having specified the sacramental form in its entirety, the prescription then warns that if the priest-celebrant should omit anything at all (aliquid) of this form -- for example, omit the words "the mystery of faith" -- or use different wording that would change the meaning of the prescribed words, then "he would not consecrate the Sacrament"; he would celebrate no Mass at all.
23. What is the binding force of rubrics? In the article under the heading Rubrics by F. Cabrol in The Catholic Encyclopedia, Vol. XIII, p. 217, 1913 edition, we read:
"Obligatory Character. -- ...Writers distinguish between Divine and human rubrics, but as soon as rubrics are approved by the sovereign pontiff and promulgated in his name it seems to us that they emanate from a Divine-human authority, and none save the Church has the right to establish such rules. ...
"It may be said that the rubrics of the liturgical books are real laws; this follows from the definition: they are prescriptions for the good order of external worship in the Catholic Church, they emanate from the highest authority -- the sovereign pontiff -- and considering the terms in which they are promulgated it does not appear that the supreme head of the Church merely desires to give a counsel. ...[T]he minds of the sovereign pontiffs as expressed in their Bulls, which in establishing and promulgating rubrics, intend to make them real laws."
24. Some may argue that De Defectibus, being thus classified as a law, may be legitimately and validly changed by another Sovereign Pontiff; for example, Paul VI. I reply that the text of De Defectibus I cited above (in pars. 19-20) is not merely a law pertaining to a purely disciplinary matter -- that is, "prescriptions for the good order of external worship in the Catholic Church," as Cabrol puts it. Much more than the preservation of "good order of external worship" is intended here. These particular dicta are definitive teachings of sacramental theology regarding the sacramental form of the Holy Eucharist. They fall within the domain of dogmatic theology, rather than ecclesiastical law.
25. This is true because rubrics relating to the matter or the form of sacraments take on a new dimension. "The Rubrics, if we except the few which regard the matter and form of sacraments [emphasis added], are ecclesiastical laws ..." (Notes on the Rubrics of the Roman Ritual, by Rev. James O'Kane, Jas. Duffy & Co., Dublin, 1922, p. 14).
26. Simply examining Part V of De Defectibus drives this point home. It is a plain statement of theological fact on a most vital matter. In effect it says to the priest: "Here are the words you must recite. They are all essential. If you leave anything out or change anything you will not celebrate a valid Mass." What the informed priest will also know is that the full authority of the Sovereign Pontiff is behind this teaching.
27. An aside: An important point to note is that the aforementioned Part V of De Defectibus does not speak of two forms. The singular noun "forma" -- "The words of Consecration, which are the form of this Sacrament, are these:" -- means that the form of this Sacrament, although twofold in nature, is but a single form. Hence any of the proscribed violations of the form -- either of the part for the consecration of the bread or of that for the consecration of the wine -- invalidates the whole Sacrament. "Now if one were to omit, or to change anything in the form [N.B. "the form" : singular] of the consecration of the Body and Blood, and in that very change of the words the [new] wording would fail to mean the same thing, he would not consecrate the Sacrament."
28. Some persons who accept our arguments that the wine consecration is invalid and therefore the Mass itself is invalid, nevertheless believe that the hosts may be truly consecrated. If the interpretation in the preceding paragraph is correct, then such a belief is unfounded.
V. Synopsis Of The Preceding Points
29. To prove the necessity for validity of the words "the mystery of faith" in the consecration form for the wine we have specifically named these authorities: St. Thomas Aquinas, the Roman Catechism, St. Pius V, St. Antoninus, Innocent III, the Salmanticenses, Raymond Capisuccus, O.P., Emmanuel Doronzo, O.M.I., and, lastly, Part V of De Defectibus.
30. We have cited the incident of the expunging by Pope St. Pius V of the contrary opinion held by Cajetan (supra, Part III, pars. 15-17).
31. The detailed and cogent evidence from the teaching of St. Thomas Aquinas was presented in paragraphs 9-13 of Part II.
32. The whole of Part IV (pars. 1828) was devoted to a treatment of the doctrine of the Ordinary Magisterium of the Church found in Part V of De Defectibus in Celebratione Missarum Occurrentibus, which comprises part of the official rubrics of Missale Romanum.
…
VI. Origin Of The Words "The Mystery Of Faith"36. All of the words of the wine consecration form are found in Holy Scripture, with the exception of "and eternal" and "the mystery of faith." What, therefore, is the origin of these words? "[N]early all these words [of the wine consecration] can be culled from various passages of the Scriptures. Because the words, This is the chalice, are found in Luke xxii 20, and in 1 Cor. xi 25, while Matthew says in chapter xxvi 28: This is My blood of the New Testament, which shall be shed for many unto the remission of sins. The words added, namely, eternal and mystery of faith, were handed down to the Church by the apostles, who received them from our Lord..." (Summa Th., III, Q. 78, A. 3, ad 9).
37. St. Thomas therefore teaches here that the words "the mystery of faith" are derived from Tradition (Tradition with capital "T", which is one of the two sources of Divine Revelation), since they "were handed down to the Church by the apostles, who received them from our Lord."
38. It is not merely an "opinion" that the Angelic Doctor is here expressing; rather it is a fact of ecclesiastical history -- nay, a truth of Divine Revelation -- fully substantiated by the Papal authority of Innocent III in his doctrinal letter cuм Marthae Circa, Nov. 29, 1202. (Cf. Denzinger, Enchiridion Symbolorum, nos. 414-415).
39. An Archbishop of Lyons had inquired of Pope Innocent who it was that inserted "the mystery of faith" in the consecration form for the wine. In cuм Marthae Circa the Sovereign Pontiff replied as follows:
"You have asked (indeed) who has added to the form of words which Christ Himself expressed when He changed the bread and wine into the Body and Blood, which are in the Canon of the Mass that the general Church uses, but which we find expressed by none of the Evangelists. ... In the Canon of the Mass that expression, "the mystery of faith," is found interspersed among His words. ... Surely we find many such things omitted by the Evangelists from the words as well as from the deeds of the Lord ... Therefore We believe that the form of words as is found in the Canon, the Apostles received from Christ, and their successors from them" [emphasis added].
40. What is the force and status of cuм Marthae Circa? It is not just the theological opinion of a pope writing as a private theologian. Leeming calls it a "doctrinal letter" (Principles of Sacramental Theology, 1960, p. 255). Its very inclusion in Denzinger shows that it is part of the Ordinary Magisterium of the Church. Since those words "the mystery of faith" were received from Our Lord by the Apostles and handed down by them, they come down to us via Apostolic Tradition, one of the two sources of Divine Revelation. And that is why I claimed in par. 38 above that the words "the mystery of faith" are in the wine consecration of the Latin Rite through Divine Revelation.
41. Anyone who would be so bold as to gainsay the teaching of Pope Innocent III that the words "the mystery of faith" were in the Latin Rite consecration form from the very beginning would be obliged to show when, where and by whom these words were inserted at some later date. Such evidence cannot be found, and in quest of it one would in vain search the Apostolic Constitutions, the Decretals, the writings of the Apostolic Fathers and the Doctors, all extant official ecclesiastical records, or even the Apocrypha.
(Taken from
http://www.sedevacantist.net/newmass/mystfide.htm )