VARC;3296171:
So a Church called “The Church of Satan”, if it was “orthodox” to it’s faith,is a true church?
Would this be the church of Matthew 16 (verse 23 that is).

Actually

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What does it mean when the Christian Church is called The Universal Church of Christ?
Unfortunately, no trademark, so we, since the time of Revelation (2) “cannot bear evil men but have tested those who call themselves apostles but are not, and found them to be false…the slander of those who say that they are Jews and are not, but are a synagogue of Satan”
How does one come to “that” particular number of only 7?
What Biblical or Apostolic support is there for that theory?
And how is “that” the “real” question?
Just how history has worked so far. (what’s the magic number of sacraments?) We have had several Pan-Orthodox Councils, but have not been mired in heresies and schisms that we have needed, an Ecumenical Council.
Ever since February 19, 842, when that Sunday, the first of Great Lent that year, the emperor and empress mother and the Fathers implimented the Seventh Ecumenical Council, and named it ἡ Κυριακὴ τῆς Ὀρθοδοξίας “the Sunday of [the Triumph of] Orthodoxy,” which has been observed, as commanded by those Fathers, in the Holy Catholic Orthodox Church ever since (it’s March 16 this year).
That is the real question because besides buzz words (even the Arians claimed the title “Catholic”), the Fathers went on to define what they (and we) believe. In fact, that was the whole debate on the wording of the Creed, for example. The Fathers worked on one that the Arians could not say without renouncing their beliefs. Said term was “one in essence”: the Arians had no qualms about “One, Holy, Catholic and Apostlic Church,” they just identified her with themselves.