Guide:Blood Moon strategies

The Event
The Blood Moon is an earlygame event. It can occur if the player has more than 120 health, and the moon must be out (not a new moon). If those conditions are met, the Blood Moon has a 1 in 9 chance to occur. It can also be summoned by a. The event consists of gory and gruesome enemies. While a Blood Moon is active, multiple effects can result.

Effects
While a Blood Moon is active, multiple effects can result.
 * Enemies spawn more often, even near homes and NPCs.
 * can open doors, meaning NPCs on the ground are prone to death.
 * Bunnies, Goldfish, and Penguins, normally passive become Corrupt (in a Corruption World), or Vicious (in a Crimson World), hostile variants of these once tame critters.
 * NPCs can sell unique items, and have unique quotes. The will turn into her Werefox form.
 * will bloom, regardless of biome, all water will turn red, and a red filter will apply on the screen.
 * Fishing Power will be 1.1 times stronger, but fishing during a Blood Moon can result in reeling up dangerous enemies.
 * Blood Moon-exclusive enemies can spawn, such as, , and.

Rewards
While a Blood Moon can be dangerous to new players, it can also wield great rewards.
 * can drop the, and when killed for the first time, will give the Till Death achievement.
 * In Hardmode, enemies can drop the.
 * The can drop the, a decent weapon.
 * The can drop the, a magic weapon.
 * can drop the.
 * Enemies exclusive to the Blood Moon can drop the.
 * Enemies caught during fishing can drop the an item that increases fishing power. Other fishing drops include the, the , and the , an item that permanently increases NPC's Attack and Defense.
 * and can drop the, a decent early-game accessory and the , an item that lets you access your  anytime, anywhere.

Arena
Due to the NPCs being vulnerable to enemies during this event, it is recommended that you make your base in the sky at the beginning. If you have already made a base, a simple barricade of a block behind a door will prevent most enemies from getting in. You will want to move your base above ground level before Hardmode, as the increased enemy spawn rate will result in more spawning, which can be a nuisance; however, they can only move upward if they're inside a block. A simple ditch can take care of most ground level mobs, even in hardmode. Even better, line the bottom of the ditch with lava and it will kill them for you. You will want to place a thin layer of lava in the ditch, enough to burn, but not. To make sure that the amount of lava is correct, throw a copper coin in. If it burns, you have met the minimum requirement. If not, add more until it does, but slowly until the coin disappears. Next, throw a silver coin in. It shouldn't burn. If it does, remove some and try again. Repeat until the copper coin burns, but not the silver. As said above, traps can make the arena even deadlier when used correctly. Keep in mind that Drippers can hover and fly above your defenses.