Ephraim Ben Joseph is the Horse-Rider of Jacob's Prophecy about Dan

Genesis 49:16-17

Dan shall judge his people, as one of the tribes of Israel.

Dan shall be a serpent by the way, an adder in the path, that biteth the horse heels, so that his rider shall fall backward.

This passage is frequently the beginning of attempts to say The Antichrist will come from Dan, along with a reference to Dan in Jeremiah that also mentions Horses.  But who/what are this Horse and it's Rider?

 It is commonly speculated that the reason Dan and Ephraim are left out of the 144,000 in Revelation 7 is how it was through them that Idolatry entered Israel, in Judges 17-18 and then with Jeroboam, an Ephraimite who built Golden Calves at Dan and Bethel in Ephraim.

It is often assumed that the difference with Ephraim is Ephraim is still represented by the name of Joseph, since Manasseh is named separately Joseph here must be only Ephraim.  But Numbers 13 doesn't remind us of Joseph when it identifies Ephraim's Spy, but calls it's Manasseh spy of Joseph.  Manasseh himself as a Firstborn was kind of split in two, the two sides of the Jordan, called Machir and Gilead in the Song of Deborah, and this is needed to justify Jeroboam getting Ten Tribes, attempts to justify saying he also got Simeon will not hold up.  Maybe the two tribes left out of the Sealing are involved with The Mark, Satan's counterfeit of the Seal?

Now, both that Judges narrative and the Jeroboam situation may make you think Ephraim lead the way and Dan followed.  But Ephaim's major spiritual problems don't start till Judges 17, while a Danite has an issue already  in Leviticus 24.  But I also think that the mother of Micah in Judges 17 was Delilah and that Delilah was not a philistine.

Jacob's blessing on Joseph in Genesis 49 says he has a Bow and depicted him as an Archer, Zechariah 9 also depicted Ephraim as an Archer.  Isaiah 28 says Ephraim has a Crown.  Isaiah 63 represents Israel as a Horse.  The rider on the White Horse in Revelation 6 has a Bow and a Crown, and is often speculated to possibly be The Antichrist while others have wanted to make him a more positive figure.

It is interesting to note that Jehu wielded a Bow and Arrow when he overthrew Jehoram while riding  a horse drawn chariot.   Jehu is someone a Messiah Ben-Joseph claimant may seek to model themselves after.

Maybe the False Prophet is from Dan and The Antichrist from Ephraim?  When I look at the Prophetic model lots of Rabbinic Jews are expecting, it's easy to see Messiah Ben-Joseph who is Mortally Wounded by Armilus as the Beast, and the False Prophet as Messiah Ben-David who resurrects him.  There is also a view proposed in Rabbinic writings that Messiah Ben-David's mother will be from Dan. 

I feel like I've made a solid case already, but for those who believe in Mazzaroth/Gospel in The Stars theories, I have one more factor to add.

The most popular constellations to identify Joseph/Ephraim with are Aquarius and Taurus (and if Manasseh needs a separate one it's one right next to one of those).  I see no Biblical basis for Aquarius.  Taurus is justifiable by Joseph's blessing in Deuteronomy 33 where he's called a Cow and an Aurochus (Re'em translated Unicorn in the KJV), but in that context Leo is no longer Judah but either Gad or Dan.

In Genesis 49 Joseph is an Archer, the Archer constellation is Sagittarius, who is also a Horseman and has but isn't wearing a Crown, the Corona Australis.  People looking for astronomical references in Revelation tend to see the White Horseman as Sagittarius for these reasons.  And Sagittarius is right next to Scorpio, which gets identified with Dan based on Genesis 49.