Moon Lord

The Moon Lord is the final boss of Terraria and one of the game’s most complex fights. He appears after the Lunar Events have been completed and attacks by combining multiple body parts, each with its own health pool. His hands and forehead contain eyes that must be destroyed before the core in his chest becomes vulnerable. Each eye can only be damaged while open, and the core can only be attacked after all three eye targets have been defeated.

During the fight, the Moon Lord tries to keep himself centered relative to the player, placing his head above the player and his hands to either side. He also teleports with a burst of white light whenever he is summoned, when he despawns, when his target dies, or when the target moves too far away. While he is alive, enemy and critter spawning is suppressed near players within range of his core, making the battlefield feel especially empty. His presence also darkens the sky and adds a hazy blur effect; in multiplayer, this visual effect only applies to players close enough to him.

The head eye is the most important target to prioritize, since it is the only eye that can fire the Phantasmal Deathray. Destroying it early reduces the danger of the fight and prevents having to deal with two True Eyes of Cthulhu for long. The hand eyes can still be dangerous, but they are generally less threatening than the head eye. Because the Moon Lord’s eyes clear all debuffs whenever they close, debuff-based damage and utility must be reapplied during the open windows.

• Keeping distance and staying mobile are critical. Fast wings, dashing accessories, teleportation tools, and long skybridges or minecart tracks all help with dodging.
• Homing weapons or homing ammunition are useful because they let the player focus more on movement.
• The Phantasmal Deathray is the attack to watch most carefully. Moving near the Moon Lord’s head and circling the central eye can make the beam easier to avoid.
• The Moon Lord’s attacks bypass invincibility frames, so setups that rely on brief immunity after taking damage are much less effective than usual.
• Teleporting to the Nurse can be risky, since the Moon Lord may immediately teleport to the player and punish the heal attempt.
• In multiplayer, the boss targets the nearest player, so teammates can alternate positions or healing runs to manage pressure.
• Moon Leech Clots move toward the mouth at a fixed travel time, and staying close to the mouth can actually make them easier to destroy before they drift away.
• Some of his projectiles are affected differently by NPCs: true eyes and eye sockets can still deal contact damage, while several projectile attacks are less likely to kill NPCs outright.
• If the player is trying to farm him for specific drops, the Moon Lord is the source of some of the game’s most valuable rewards, including the materials used to craft Zenith.

He is also notable for being immune only to Confused and Shimmering, for having a unique death sequence, and for dropping the highest coin total of any enemy in the game. Despite his massive scale, the Moon Lord’s body parts can be partially hidden by solid blocks and walls because he is drawn behind them, which is only a visual effect and not true invisibility.