Later, Sam and Dean recruit [[Donatello Redfield]] to translate the demon tablet to locate a spell capable of opening an [[Portal|inter-dimensional rift]] to make their way to [[Apocalypse World]] to save [[Mary]] and [[Jack]]. Due to his [[soullessness]], the dark energy resonating within the tablet causes him to go mad and retaliate against the Winchesters, forcing Castiel to strip the spell from his mind, effectively leaving the mad prophet brain-dead. After acquiring the necessary ingredients for the spell, Sam, Dean, Cas, and [[Gabriel]] make their way to Apocalypse World and lead an exodus of humans into their world to prepare for a battle against [[Michael (Apocalypse World)|Michael]] and his angelic armies.
After Jack dies due to his lack of [[grace]], the Winchesters call in [[Lily Sunder]]
in an effort to have her read Kevin's translations on the angel tablet in the hopes that it will contain something they can use to save Jack. The effort proves to be futile, but Lily offers another solution. Months later, after Donatello's mind is discovered trying to rebuild itself, Castiel is able to awaken him. Though Donatello remains soulless, he is no longer corrupted by the dark effects of the demon tablet on his mind .
The demon tablet is the second tablet to be unearthed. It contains sections on the demonic influence on the collective tapestry of the soul, and demonic transport to the regions of Hell. It also includes instructions on how to see hellhounds and how to destroy demons, as well as containing a number of spells, sigils, and protective circles that can be used against demons. The most notable spells on the demon tablet are instructions on how to close the Gates of Hell forever and how to create an [[Portal|interdimensional rift]]. It is currently in the [[Men of Letters Bunker]].
===[[8.01 We Need to Talk About Kevin]]===
===[[13.20 Unfinished Business]]===
As they wait for [[Gabriel]]'s [[grace]] to recharge enough to reopen the [[portal]], Sam tells Dean that [[Rowena]] is "boning up" on the demon tablet, possibly familiarizing herself with the spells inscribed on the tablet to prepare for their journey to Apocalypse World.
The angel tablet is the third tablet to be unearthed. It contains multiple spells, sigils, and protective circles that can be used against angels. It appears to
contains angelic [[trials]], though their purpose was not revealed. It also includes a second spell, personally placed by Metatron, that can banish all angels from Heaven and lock the gates. Metatron used the angel tablet to enhance his powers to make himself semi-equivalent to God. It was destroyed by Castiel to weaken Metatron and reclaim Heaven. Before his death, Kevin was able to translate the entire angel tablet into Proto-Elamite cuneiform. His translations remain in the Men of Letters Bunker.
[[File:Angel Tablet.PNG|350px|thumb|The [[Angel]] Tablet.]]
* In [[7.20 The Girl with the Dungeons and Dragons Tattoo]], the contents of the suitcase Sam and Dean stole from the [[leviathans]] was a hunk of red clay, but in [[7.21 Reading Is Fundamental]] it appears as a gray stone before Dean breaks it open and recovers the leviathan tablet.
* In a deleted scene for [[13.07 War of the Worlds]] its shown that the reason [[Michael (Apocalypse World)|Michael]] never repeated the spell from the angel tablet is because Kevin didn't have enough ingredients to repeat the spell and they were almost impossible to find in the first place.
* The tablets have played a role in Seasons 7, 8, 9, 10, 11, 13, and
14, albeit with the roles in Seasons 10, 11, and 14 being minor cameos. The tablets were especially prominent in the storylines of Seasons 8, 9, and 13.