Catalyst

In an alternate universe, floating among many, the natural order of things was disrupted, which is usually good. In this case, it was bad. Very bad. You see, the Multiverse is a very delicate eco-system, and can explode in a nanosecond if one little thing goes wrong, which is why it requires expert care. The Multiverse is overseen by the Caretakers (or so I heard) who were able to escape from their universe, and began a system of overseeing and managing the Multiverse. They deemed most universes to be "too dangerous" to run naturally, and would intervene by altering aspects of that universe until it seemed safe. Unfortunately, the Caretakers didn't know just how bad they were screwing everything up, because their alterations actually began creating alternate universes. The Caretakers held a press conference stating, "We're really sorry. We had no idea this would happen, and unfortunately, we may all be obliterated at any time now. We urge calm and ask everyone to go about their normal lives, and hopefully, we can get this whole mess sorted out."

The procreation of universes created a kind of "cancerverse". This is a rapidly respawning universe that has no regards for time or space, and would duplicate itself over and over uncontrollably. All of the cancerverses were put on review for "termination" so that they wouldn't cause existence to cease by overwhelming the Multiverse.