Your argument is flawed. When Moses wrote the Pentateuch the writings of the prophets did not exist. Does that mean they're not scripture? The NT is scripture because the Church recognises them as such. The same goes for the OT. But then you are a heretic and so it's not surprising that you have a screwed view of the NT and most importantly of Christ, nay, you believe in some other Christ, not the Christ of scripture.
So CHRIST is wrong when he claims that
King James Bible
Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.He doesn't claim to come to just fulfill the Torah does he?
In fact he claimed to
King James Bible
And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me.I guess your use of the word heretic is again misused and deliberately done ignoring what Christ said:
Now if Christ never said that then you would have a point.
But in the NT Jesus meets up with Elijah the Prophet and Moses.
You see the Word of God in the OT and the works are confirmed by Christ.
Just as Christ did not mention any NEW scriptures nor the Prophets or the disciples then we can be sure that Christs words are living words. For the bible is about truth. The truth is that Jesus was to bring the truth to man about what God wanted.
But nowhere does the Father or the Son state New Scriptures will come. Hence the truth is that God changes life no more through the written but through the Spirit.
King James Bible
Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.John 16:13
The Spirit teacheth all believers now.
What Christians write is not what saves but whom you believe in and whom teaches you.