The Shattering

The Shattering was a major disaster caused by Energized Protodermis leaking out from the core of Spherus Magna. It caused Spherus Magna to shatter in to three pieces, Bara Magna, Aqua Magna, and Bota Magna, the latter two becoming moons of the former, Bara Magna.

The Shattering occurred soon after the Core War began, but ended the war as well. It also forced most of the Great Beings to leave Sepherus Magna and depart for New Universe.

Trivia

 * This was the equivelent of the Great Cataclysm inside the Matoran Universe.