Magnus Incident

Almost all potential fundamental calamities (catastrophes created by imbalance of Soul and Null) have been prevented by undetermined outside forces. Here is an exception.

Background
The planet of Animus-Epsilon 9, locally referred to as Magnus, was a large ocean-island planet with a circumference of roughly 70,000 kilometers. 96% of the planet's surface was covered in water. The primary state of Magnus was the Global Senatorial Republic of Magnus, which comprised nearly 85% of the planet's population of about 135,000,000. The planet suffered from lack of geographical space, due to the restricted land mass size of the planet. The planet had a near total lack of magic. On an unknown date, assumedly in local year 2454, the Republic became aware of the existence of Soul and Null. The circumstances surrounding this discovery are unknown.

The Magnus Incident
Over the course of the next 11 years, the Republic Salvation in Null Division (SIN) sought for a way to harness Null as a source of unlimited energy. Using such energy, they hoped to solve pressing issues such as food and land shortage. By the year 2460, SIN successfully created it's first iteration of Null—shallow and weak, but a daring step nonetheless. While they managed to extract enough energy to power simple machines, they knew they needed to delve deeper to unlock the unlimited energy they sought.

SIN grew increasingly advanced in its scientific understanding of Null, using technology-fueled spatial distortion where they lacked magic, though they underestimated Null's quasi-sapient hunger. On Arum 32, 2465, SIN pierced a near-perfect hole in space, creating an extremely deep outlet of Null; however, due to their planet's relative lack of Soul, their spatial distortion fields were not enough to contain the substance. Pockets of Null began appearing within an unrecorded space around containment. The spatial distortion projectors were destroyed within 30 minutes. After an hour, the entire facility had been consumed, and 70% of personnel killed. Within 36 hours, the Null had overtaken roughly 25,000 square kilometers. Due to the cataclysm taking place on one of the few landmasses on the planet, over 32,000,000 died.

At 1400, Arum 34, 2465, the sea of Null suddenly imploded, collapsing back to its original point and disappearing. By this point, tectonic devastation had overtaken the planet. Earthquakes and flooding were prevalent across the globe. A further 9,000,000 died in the aftereffects of the incident. All remaining residents (as far as is known) were evacuated.

About 2 months after the incident, anomalous pockets of Null began reappearing on Magnus, making the planet further uninhabitable. The source of the the collapse of Null at komé 1400 is unknown.