The Horde is an Event summoned through use of the Horde Staff or Hardmode Horde Staff at Night. It is defeated once a certain number of enemies are killed and will end inconclusively if it becomes Day, not counting as a defeat. During the event, an army of zombies and other undead creatures invade the world. This takes place all across the Surface of the world, with uniquely themed enemies appearing in certain Biomes.
This event has two versions: Pre-Hardmode and Hardmode. The version that going to happen depends on which Horde Staff you are going to use.
The event initially consists of a basic zombie invasion, not dissimilar to a Blood Moon albeit with different zombie variants. However, as the player progresses through the game, the event becomes lengthier and more difficult with an array of increasingly more powerful monsters unlocked at key points of progression. With this added difficulty comes new and improved loot ranging from unique armor, weapons and accessories to crafting materials which unlock new tiers in progression.
In addition, spawn rates for all regular nighttime enemies is greatly increased throughout the event.
After defeating the Eye of Cthulhu:
After defeating Skeletron:
After defeating Queen Bee:
From Torch Zombies:
From Maggot Zombies:
From Fitness Zombies:
From Floaty Zombies:
From Scuba Zombies:
From Sandswept Zombies:
From Bowman Zombies:
From Bone Warriors: