The Black Temple is where Grado and his men, alongside Morva, first defeated the Demon King by imprisoning him inside the sacred stones, however they were unable to defeat his body, and it was left to sleep in the Black Temple, guarded by the Manakete Morva. In the final level of The Sacred Stones, the body of the Demon King is destroyed, and Ephraim notes that they, with the help of the sacred relics, had done more than even Grado had been able to do. They had destroyed the body of the Demon King as well as reimprisoned him in the one remaining stone.