Second death is only mentioned in Revelation
No, it is also mentioned in Genesis 2:17 and is clearly seen in the Hebrew text but is lost in the translations. However, the Hebrew word more commonly found in the Hebrew text is not "tā·mūṯ" which is found in Gen 2:17 in association with the Hebrew word "mō·wṯ" which precedes it, but in Leviticus 20:10 it is the Hebrew word "yū·maṯ" that follows the Hebrew word "mō·wṯ-".
I am curious about the evidence you changing Scripture.
Really, you are claiming that I have changed the scriptures? It is the translators who have changed the context and meaning of the scriptures with respect to the Second Death based upon the misunderstanding of the Jewish scholars of Gen 2:17. The clear meaning of the "second death" in Revelation 20 is that if you have sinned against God and have not repented of yur turning away from God then you die the second death. This is the context that I have applied in Lev 20:9-16, that if you sin against God's statutes and commandment then you will become a candidate for the second death if you do not repent of your sins.
And how would people in the time of Moses understand the meaning of the second death, there was hardly a concept of afterlife, let alone the existence of the Lake of Fire.
In the book of Genesis, there are two accounts where the second death is alluded too. The first time is when the Abraham went down to Egypt in Gen 12:10-20 and more directly in Gen 20:1-18 when Abimelech took Sahar, Abraham's wife into his house.
In both of these stories, the concept of the afterlife and the consequence of sinning against God was certainly understood, just as the concept that the descendants of Abraham and Jacob understood that they were a special people group and that they had a covenantal relationship with God. During the time of Moses, the descendants of Jacob would have known about the concept that if you sinned against God, then you would have died the second death. It was a traditional oral understanding and Moses recorded when he wrote the first five books of our scriptures.
Your rebuttal is based upon a flimsy understanding of the Scriptures. The concept of the Second Death is woven into the scriptures from the time of Adam right up to this present time and even to when the final judgement will take place.
Shalom