Zombies and their counterparts become able to open Doors.Enemies can spawn near towns, even though those normally suppress enemy spawns.Spawn rates below the surface remain the same. It only affects spawn rates above the surface.This works no matter the environment, so for example Corruption and Crimson enemies can swarm more than they normally would.Not only do they spawn faster, but more are spawned than can normally exist on-screen at once. The spawn rate of enemies on the surface increases.

This content is transcluded from Blood Moon § Effects. While a Blood Moon is active, multiple effects can happen: Weather-related occurrences (like Windy Days or Thunderstorms ) do not count as events, so there can be crossovers. It will also not spawn if another event is currently taking place, such as Lantern Night or Slime Rain. Given those criteria, a Blood Moon has a 11.11*1/9 (11.11%) chance of occurring.

Blood Moons are signaled by the message 'The Blood Moon is rising.' in the lower left corner of the screen (or the top middle of the screen on Mobile).Ī Blood Moon will only occur if at least one player in the world has more than 120 life, and only on nights when a moon is present (any night except a new moon). A Blood Moon is a common randomly occurring event that takes place over the course of an entire night however, a Blood Moon can also be initiated when the player uses a Bloody Tear.

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