Lunar Events

The Celestial Events are a series of four Hardmode, post-Plantera events initiated by defeating the Lunatic Cultist boss. Once the boss is defeated, several surface biomes show a large moon in their backgrounds, and spawn several unique enemies. The moon biomes will spawn in four distinctly spaced sections of the world. Defeating the pillar will revert the area back to normal. In order to defeat any of the four pillars, one must first kill 100 monsters (150 in Expert Mode) corresponding to the selected pillar in order to remove the barrier that is protecting it. To find where these pillars are, open your map. There will be icons of each pillar which will show where it is.

Each of the four variants has a different theme, along with a corresponding Celestial Tower variant that acts as the centerpiece of the event.

Upon defeating all four pillars, the message "Impending doom approaches..." appears in chat. The screen begins to shake, and approximately one minute later the Moon Lord will spawn on top of the player.

Tips

 * When fighting the Solar Pillar, take into account that the Crawltipede does not target players on the ground. It may be easier to stay grounded while fighting it, although this may make it somewhat more difficult to deal with Corites depending on weapon selection.
 * The pillars retain their damage, regardless of player deaths.
 * An effective setup for melee players is The Horseman's Blade and Turtle Armor or above. Then build a small area where you can have lots of statues that spawn enemies so when your sword kills them, it spawns homing pumpkin heads. Have up to three statues of the same types.
 * An effective setup for a melee player could be the Cosmic Car Key and Vampire Knives as it allows the player to dodge all monsters and also heal the player at a good rate.
 * An effective setup for a ranged player is the same mount listed above, alongside a gun with high firing rate and Meteor Shot or Chlorophyte Bullet. Examples of such guns are the Chain Gun, the Megashark, or if you happened to had fought the Moon Lord previously, the SDMG. For even more of an advantage, players may wish to bring an Ammo Box or Ammo Reservation Potion.
 * Players may wish to use the Stardust Dragon Staff or another powerful minion to provide aid throughout the lunar event if they don't mind the inventory space used up, even if your gear does not authorize more than one. This provides aid in maintaining crowd control, especially with the Crawltipede in the Solar Pillar areas.

History
Événements Lunaires