During the rare Horde Moon event, the weight of zombie spawns will be greatly increased, and during a Super Horde Moon, all mob spawns will increase by a large amount as well, leading to a world overrun by the walking dead.

This mod can be used with or without the default moons, but still requires the Enhanced Celestials 2 Core mod.

Just for fun, try it with The Hordes

 All credit for Enhanced Celestials 2 goes to Corgi Taco.