Tablets
From Super-wiki
The Word Of God is an inscribed tablet that was excavated by Dick Roman in Iran. It was written by the angel Metatron, and includes instructions on how to kill the Leviathan.
7.20 The Girl with the Dungeons and Dragons Tattoo
7.21 Reading Is Fundamental
Dean cracks the stone containing the tablet. As he does so there are electrical storms, women go into labour, Kevin Tran becomes a Prophet, Castiel