A conquistador under Hernán Cortés, Juan Atrevido del Castillo is the original Castillion.  He sails with the other Spanish conquistadors in 1519 and helps conquer the Aztec Empire.  After the death of Moctezuma II, the Castillion has a revelation while inside an Aztec pyramid.  Surrounded by magical codices, sacrificial blood, and thousands of human hearts the Castillion realizes he was chosen to unite the magical systems of his Gods and the Aztec Gods to create The Black Rite.  Cuitláhuac is now Aztec King, and the Castillion offers him a deal.  Death and destruction are coming for his city and his people, but he can save them both by making the ultimate sacrifice.  Cuitláhuac agrees.  The Castillion publicly sacrifices Cuitláhuac and eats his heart, uniting the magical systems of the two worlds, and performing The Black Rite for the first time.

Now possessing the knowledge to obtain immortality, the Castillion hastily returns to Spain and forms a plan to use The Black Rite and achieve world domination.  Over the next 500 years the Castillion offers the secret of the Black Rite in exchange for wealth, power, and influence.  He creates a pyramid of power known as the Reborn Few with the Castillion at the top.

Juan Atrevido del Castillo and Cuitláhuac (who is reborn as Juan’s first son) continue performing the Black Rite until the present day.  Juan’s names throughout history have been:
1. Juan Atrevido del Castillo – Original Castillion
2. Juan Atrevido del Castillo II
3. Juan Atrevido del Castillo III
4. Simon Atrevido del Castillo
5. Juan Atrevido del Castillo IV
6. Juan Atrevido del Castillo V
7. Jaime Atrevido del Castillo
8. John Atrevido del Castillo
9. John Atrevido del Castillo II
10. John Atrevido del Castillo III (1995 – ) – Current Castillion at the end of the album The Fall of the Son.