The Unwritten Book - Doom Patrol (2019)

A source of great magic that could summon the Decreator to end the universe, the Unwritten Book was a living being called Elliot Patterson, who was raised by his cultist parents. As he grew older, incantations would form on his body, until they were completed on his 18th birthday.

The "Book" was kidnapped by Cyborg and several other metahumans, forcing the Cult to summon all the forces of Nurnheim to recover them from the house of Dr Niles Caulder. Despite an attempt by Willoughby Kipling to destroy him with fire, the Book survived long enough to be captured by The Little Sisters of Our Lady Razor, who took him into the back garden and read him.

This allowed for the Decreator to be summoned into the Universe and begin destroying the world.