The Drowned God, also known as He Who Dwells Beneath the Waves, is a sea deity worshiped solely by the ironborn of the Iron Islands in Westeros. The religion of the Drowned God is old, dating back to before the Andal Invasion. The Andal invaders of the Iron Islands converted to the local religion rather than supplant it with the Seven as they did in the south of Westeros.
It is said the Drowned God made the ironborn to reave and rape, to carve out kingdoms and to make their names known in fire and blood and song. The Drowned God himself is believed to have brought flame from the sea and sailed the world with fire and sword. The Drowned God's eternal enemy, the Storm God, resides in a hall within the clouds and ravens are his creatures. It is said the two deities have been in conflict for millennia and the sea roils in anger when they engage in battle. However, much like the Drowned God, no one aside from the ironborn believe in the Storm God.