Gog and Magog

Gog and Magog were primitive humanoid creatures made of rock and sand, who were ancient warriors who had conquered most of the fertile crescent, who were eventually, according to Donatello Redfield, bound by priests to be banished to "a place without a place, a time without a time."

History
At some point prior Noah' Great flood period, Gog and Magog species thrived. The species eventually wiped out when the flood came, but some of them survived somehow.

Some of them later conquered had conquered most of the fertile crescent, who were eventually bound by an unknown group of priests to be banished to "a place without a place, a time without a time."

At some point, "God" craft weapons for them. But it is unknown what god they referred to, either God himself, or refer an unnamed Canaanite god.

Season 13
Gog and Magog summoned by Castiel, using a spell from Demon Tablet. The summoned Gog and Magog confused, who summoned them. Dean mocking their appearance, while Castiel warned him. The Gog and Magog subsequently attacked them. One able to break angel blade carried by Dean. In a struggle, one of them dropped his sword. Dean decapitated one, and stabbed another one, which nearly killed Castiel.

Castiel, upon inspecting wound of the creature, revealed that their body made from rock and sand. He also revealed that such kind of this creature had been long time ago vanished from the Earth. He also correctly deduced that, since they made from solid bulk mass of rock and sand, there is no heart on them. He subsequently deduced that Donatello asked them to summon them in attempt to kill Castiel and Dean.

Powers and Abilities

 * Super Strength - Gog and Magog are quite powerful creatures, which their raw power that their possessed able to decimate a Seraph easily. Another one have enough raw power to break even an angle blade with single slash.
 * Immunity - Gog and Magog are extremely immune with any weapons. Only weapon crafted by God can kill them.

Weaknesses

 * God-crafted Weapons - Any weapon crafted by God can kill them.
 * Magic - Donatello said that, in past, they were banished by a group of priests to land of nowhere using a spell. However, since Donatello under effect of Demon tablet curse, it is unclear if he said truth or not.

Appearance

 * Season 13
 * Good Intentions

Lore
Gog and Magog in the Hebrew Bible may be individuals, peoples, or lands; a prophesied enemy nation of God's people according to the Book of Ezekiel, and according to Genesis, one of the nations descended from Japheth, son of Noah. In many Abrahamic religions eschatology, Gog and Magog depicted as "uncivilized, barbaric, and war-hunger race" that left only destruction across their path.

The Gog prophecy is meant to be fulfilled at the approach of what is called the "end of days", but not necessarily the end of the world. Jewish eschatology viewed Gog and Magog as enemies to be defeated by the Messiah, which will usher in the age of the Messiah. Christianity's interpretation is more starkly apocalyptic: making Gog and Magog allies of Satan against God at the end of the millennium, as can be read in the Book of Revelation.

A legend was attached to Gog and Magog by the time of the Roman period, that the Gates of Alexander were erected by Alexander the Great to repel the tribe from invading more civilized hemisphere of Old World.