As you know, sectarianism blinds one's reason and brings forth absurd beliefs.
If we go by the text of the verses to determine which one could be the last one, what would a sectarian say about the following?
6:115 Completed is the Word of your Sustainer in truth and Justice. None can change His words and His laws. And He is the Profound Hearer, the Knower. [6:34, 10:64, 17:77, 18:27, 33:38, 33:62, 40:85, 48:23]
4:82 Will they not then, try to understand this Qur’an? If it were from other than God they would have found in it much contradiction and inconsistencies.
10:37 This Qur’an could not possibly have been devised by anyone except God. Nay, it is a confirmation of the (truth in) the earlier revelations, and a clear exposition of the Eternal law. Without any trace of doubt, this Book is from the Sustainer of the Worlds. [While it confirms the surviving truth in the previous revelations, it is a Watcher over them and ignores and, where necessary, corrects the human touch in them. 2:75, 2:78-79, 2:101, 3:70-71, 3:78, 3:186-187, 5:13, 5:41, 6:91, 9:31]
15:9 We have sent down this reminder, and We will guard it. [6:115]
29:48 (O Prophet) you were never able to read a book before this (Qur’an), nor could you write anything with your own hand. Or else, those who try to disprove the truth might have some reason to doubt it. [2:23. Biyameenik = With your right hand = With your own hand]
52:2 And a well-scored Book it is.
52:3 Written on fine parchment, unrolled, open for everyone to read, widely published.
[Raqq = Deer skin = Parchment. Right here is the unequivocal negation of many accounts of fabricated Hadith that the Qur’an was written on bones, date-leaves, stones etc. Manshoor = Unfolded, unrolled, available to be seen and read, open to understanding, widely distributed]
75:17 It is up to Us to gather and preserve it and the reading of it.