According to the records of Omnipotence City's Halls of All-Knowing, the phenomenon known as the God Tempest, or the Mother of Thunder, was a cosmic thunderstorm that existed since the dawn of time, and grew gradually in size each eon that passed. The worst of its wrath was reserved for those who truly deserved it, which made people believe it had a mind of its own.
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The God Tempest was a cosmic storm the size of a galaxy. According to the Halls of All-Knowing, "its winds blew comets off course, ripped worlds from their orbit, and snuffed out stars like flickering candles." Its lightning was capable of turning moons into dust, and its thunder made black holes tremble.