Complex sentence: The devastation wrought by the Brothers led to the fall of many civilizations and the beginning of a Dark Age in Dominaria, and the destruction of Argoth caused a nuclear winter that would later lead to the Dominarian Ice Age.
Split into simpler sentences: The devastation wrought by the Brothers led to the fall of many civilizations and the beginning of a Dark Age in Dominaria. The destruction of Argoth caused a nuclear winter that would later lead to the Dominarian Ice Age.