So it all started in the universe where mrbeast runs the economy. There was a newly discovered beast goo that Chris and Chandler were assigned to test. They poured it on the ground and waited. Little did they know that an unamed plant in another testing room that could bring things to life was radiating energy to the beast goo. This was the start of Zanthor wrath, which continues to this day.
Immediately Zanthor attacked Chris and Chandles, then killed Karl, Then attacked Mrbeast himself. He made armor made of beastium, and left that universe through a beast portal.