Fics like Still Waters Run Deep

In the darkest depths of the ocean, sealed into the ma'lak box with Chuck trapped behind the Mark, Castiel loses the battle against God's rage. When Sam and Dean find Castiel on a dark patch of highway— the Mark missing and his grace weak— he cannot speak. It rains. It rains and it rains and it rains. It is a Great Flood. In order to stop God, save the world, and resolve the issues simmering between them for years, Castiel and Dean need to communicate. Perhaps they should build an ark instead.

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