I understand that the 13th tribe is Manasseh, King of Judah, the son of Joseph [IO-CEPHAS], Yesod - Water - Scorpio; in other words, Moses, the lamb [שה], will of God holding a [נחש Nachash] serpent, the power of the water, Mem [13].
The [נחש Nachash] serpent is the fiery solar force of Malkuth, or the מן Manna, the Nun of the Mem in the [מדבר] wilderness; in other words, the Mem holds the מן Manna, the power of the Nun, the word [דבר] of God.

And as Moses lifted up the serpent [נחש Nachash] in the [מדבר] wilderness, even so must the Son of man [בן־אדם - serpent- Kundalini bearer - Ophiuchus?] be lifted up. - John 3: 14

And יהוה sent fiery serpents among the people, and they bit the people; and much people of [the 12 tribes of] Israel died.
Therefore the people came to Moses, and said, We have sinned, for we have spoken against יהוה, and against thee; pray unto יהוה, that he take away the serpents from us. And Moses prayed for the people.

And יהוה said unto Moses, Make thee a fiery serpent, and set it upon a pole: and it shall come to pass, that every one that is bitten, when he looketh upon it, shall live.

And Moses made a serpent of brass, and put it upon a pole, and it came to pass, that if a serpent had bitten any man, when he beheld the serpent of brass, he lived. – Numbers 21: 6-9