There are many passages of Scripture that mention the Mark of the Beast/Antichrist and the Seal of God. You have a choice in which one you will get. You must choose to take the mark of the beast and if you do it will bring total damnation to you in the end. This mark will be offered during the Great Tribulation period of The Antichrist and if taken it will bring what appears to be good at the time because without it you cannot buy or sell to sustain your physical existence. Christians will have to make this choice. If they refuse the mark life will be hard and may even end in death but God has promised to sustain you and greatly reward you for your perseverance. Taking the mark will bring some temporary relief in difficult times but refusing it will bring you total relief and Glorification forever because you will get the Seal of God in your forehead(Rev. 7:3) and live with Him in His Kingdom forever. (Rev. 22:1-5) that says; “And he showed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb.
2 In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.
3 And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him:
4 And they shall see his face; and his name shall be in their foreheads.
5 And there shall be no night there; and they need no candle, neither light of the sun; for the Lord God giveth them light: and they shall reign for ever and ever.” The initial invisible Seal is given by The Holy Spirit while here on the earth and it is an everlasting one. (Eph. 4:30) You Must have this Seal to qualify for the physical one that will be given during the Great Tribulation. The physical mark of The Beast/Antichrist is identified to be 666. (Rev. 13:16-18). It will be invisible because it will probably be on a micro chip that will implanted in your horsehead or your hand. You will then become scan- able. If you take this Mark you are assured to share in the damnation of the Beast (Rev.14:9-11).
If you get the Seal you will Reign with Jesus in The Millennial Kingdom. after the Antichrist has been Defeated and Destroyed . (Rev. 20:4-5)
If you Take the Mark you will be Dammed forever. If you get the Seal you will be Blessed and Glorified forever.