2 Nephi 3 speaks of two seers lets look at them.
6 For Joseph truly testified, saying: A seer shall the Lord my God raise up, who shall be a choice seer unto the fruit of my loins.
7 Yea, Joseph truly said: Thus saith the Lord unto me: A choiceseer will I raise up out of the fruit of thy loins; and he shall be esteemed highly among the fruit of thy loins. And unto him will I give commandment that he shall do a work for the fruit of thy loins, his brethren, which shall be of great worth unto them, even to the bringing of them to the knowledge of the covenants which I have made with thy fathers.
8 And I will give unto him a commandment that he shall do noneother work, save the work which I shall command him. And I will make him great in mine eyes; for he shall do my work.
9 And he shall be great like unto Moses, whom I have said I would raise up unto you, to deliver my people, O house of Israel.
10 And Moses will I raise up, to deliver thy people out of the land of Egypt.
This first seer here. Shall have no other work except the work which I (the Lord) shall command him to do. He will have power to bring for the word (book of mormon) and restore them to the knowledge of the covenatns which I have made with thy fathers. Which covenants? I have talked about this already. In passing at least.
Title page of the Book of Mormon which was translated from the plates.
Which is to show unto the remnant of the house of Israel what great things the Lord hath done for their fathers; and that they may know the covenants of the Lord, that they are not cast off forever—And also to the convincing of the Jew and Gentile that Jesus is the Christ, the Eternal God, manifesting himself unto all nations (book of Mormon title page, par 2)
You see the Book of Mormon purpose is to bring us to the knowledge of the Covenants of the fathers that we are not cast off forever. WE must turn our hearts (make a covenant with) the fathers who are in heaven or be cast off when the hosts of heaven come again or be burned. Lets look at D&C for one more verse to make this point more concrete.
This shows how important the book of Mormon is in our lives. It teaches us how to return to Gods presence and see him in the flesh.
3 And I have caused you that you should enter into a covenantwith me, that you should not show them except to those persons to whom I commanded you; and you have no power over them except I grant it unto you.
4 And you have a gift to translate the plates; and this is the first gift that I bestowed upon you; and I have commanded that you should pretend to no other gift until my purpose is fulfilled in this; for I will grant unto you no other gift until it is finished. (D&C 5:3-4)
No other gift or work was to be given to Joseph until it was translated. Josephs work was not to bring Zion but this record, the knowledge of the covenants of the fathers. Now lets continue in 2 Nephi 3.
11 But a seer will I raise up [A different one than Joseph] out of the fruit of thy loins; and unto him will I give power to bring forth my word unto the seed of thy loins—and not to the bringing forth my word only, saith the Lord, but to the convincing them of my word, which shall have already gone forth among them.
You see this seer will convince them of the word that has ALREADY gone forth. Joseph brought it forth, but this seer will not only bring it forth but convince them. This is NOT Joseph.
12 Wherefore, the fruit of thy loins shall write; and the fruit of the loins of Judah shall write; and that which shall be written by the fruit of thy loins, and also that which shall be written by the fruit of the loins of Judah, shall grow together, unto the confounding of false doctrines and laying down of contentions, and establishing peace among the fruit of thy loins, and bringing them to the knowledge of their fathers in the latter days, and also to the knowledge of my covenants, saith the Lord.
13 And out of weakness he shall be made strong, in that day when my work shall commence among all my people, unto the restoring thee, O house of Israel, saith the Lord.
14 And thus prophesied Joseph, saying: Behold, that seer will the Lord bless; and they that seek to destroy him shall be confounded; for this promise, which I have obtained of the Lord, of the fruit of my loins, shall be fulfilled. Behold, I am sure of the fulfilling of this promise;
3 Nephi 16 mentions this restoring of the house of Israel. First in Verse 10 it mentions the Gentiles (that is us right now) will reject the fulness (not if but WHEN).
10 And thus commandeth the Father that I should say unto you: At that day when the Gentiles shall sin against my gospel, and shall reject the fulness of my gospel, and shall be lifted up in the pride of their hearts above all nations, and above all the people of the whole earth, and shall be filled with all manner of lyings, and of deceits, and of mischiefs, and all manner of hypocrisy, and murders, and priestcrafts, and whoredoms, and of secret abominations; and if they shall do all those things, and shall reject the fulness of my gospel, behold, saith the Father, I will bring the fulness of my gospel from among them.
11 And then will I remember my covenant which I have made unto my people, O house of Israel [O house of Israel, or back in 2 Nephi 3:13 "restoring thee, o house of Israel"], and I will bring my gospel unto them.
12 And I will show unto thee, O house of Israel, that the Gentiles shall not have power over you; but I will remember my covenant unto you, O house of Israel, and ye shall come unto the knowledge of the fulness of my gospel. (3 Nephi 16:10-12)
This is a future event. Verse 13 in 3 Nephi:16 states they have a chance to repent after they have rejected and the house of israel gets the gospel. Than if they reject it AGAIN, they will be cast out. This is their second opportunity to repent. We learn here that the "remnant" will survive. The destruction
most likely precedes or accompanies Israel getting the Gospel but I won't try to guess this.
Than in Verse 17 states, in This day (the day verse 17 is fulfilled and the Gentiles have all accepted or rejected it, Isaiah will be fulfilled which states:
17 And then the words of the prophet Isaiah shall be fulfilled, which say:
18 Thy watchmen shall lift up the voice; with the voice together shall they sing, for they shall see eye to eye when the Lord shall bring again Zion.
19 Break forth into joy, sing together, ye waste places of Jerusalem; for the Lord hath comforted his people, he hath redeemed Jerusalem. (3 Nephi 16:17-18)
I would highly encourage you to cross reference this with Isaiah 29 and 58. If you wish to look into the Servant Isaiah 49 is a good place which may or may not be the same person here. Lets put one more scripture on this to get a bigger picture of events. 3 Nephi 21 another sermon by the savior. Then compare this with the timing of 3 Nephi 16 with the idea of this future seer in 2 nephi 3.
20 For it shall come to pass, saith the Father, that at that daywhosoever will not repent and come unto my Beloved Son, them will I cut off from among my people, O house of Israel; (Cross Reference 3 nephi 16:10)
21 And I will execute vengeance and fury upon them, even as upon the heathen, such as they have not heard.
22 But if they will repent and hearken unto my words, and harden not their hearts, I will establish my church among them, and they shall come in unto the covenant and be numbered among this the remnant of Jacob, unto whom I have given this land for their inheritance; (cf. 3 Nephi 16:14)
23 And they shall assist my people, the remnant of Jacob, and also as many of the house of Israel as shall come, that they may build a city, which shall be called the New Jerusalem.
24 And then shall they assist my people that they may be gathered in, who are scattered upon all the face of the land, in unto the New Jerusalem.
25 And then shall the power of heaven come down among them; and I also will be in the midst.
26 And then shall the work of the Father commence at that day, even when this gospel shall be preached among the remnant of this people. Verily I say unto you, at that day shall the work of the Father commence among all the dispersed of my people, yea, even the tribes which have been lost, which the Father hath led away out of Jerusalem.
27 Yea, the work shall commence among all the dispersed of my people, with the Father to prepare the way whereby they may come unto me, that they may call on the Father in my name.
28 Yea, and then shall the work commence, with the Father among all nations in preparing the way whereby his people may begathered home to the land of their inheritance. (3 Nephi 21:20-28))
This is a future date. The work among ALL the dispersed of the Lords people, ALL the missing tribes, and other sheep will be gathered in in THAT day. The day when Jerusalem IS built by the Remnant. This is the exact work of the second seer. As 2 Nephi 3:13 says "in that day when my work shall commence among all my people". Do you see the similarity in the language? The similarity in the words and the timing and patterns here? The second Seer will do this work among all the people, which is YET a future event.
O YE GENTILES! The book of Mormon is definitely a pattern for OUR day.
See JST of Genesis 50. It says the same thing here. Plenty of other verses that go into this too. Ask yourself what these covenants ARE that you need to be saved. Without them we will burn up.