Ultranova

An Ultranova is a type of supernova that happens when a small object and a giant object collide. The worst to happen was the 5988 OYC problem, when a Huittaverse collided with an Exaverse. It caused 10^10^59 casualties, 154 million verses got corrupted, and lasted for 294 OYC. The most minor was when a galaxy collided with a universe. It only caused 87 casualties, and lasted for 0.0003 earth months.