Guide:Moon Lord strategies

Movement
An almost essential item for fighting the Moon Lord is the Cosmic Car Key or the Shrimpy Truffle (make sure to have water around you). While moving diagonally away from the Moon Lord, the player is slightly faster than him, allowing for you to take out one hand going one direction across the map and take out the other one vice-versa.

The other (more risky) way is to fly circles around him, this is once again, much easier when performed with the Cosmic Car Key or the Shrimpy Truffle. Going around him allows for the player to dodge the head laser.


 * Note that this strategy requires much more dodging than the previous one, and that some of these items require rare drop(s) from the Martian Madness event

Terrain preparation
Since this boss requires a lot of dodging, the best way to prepare your arena is to use a big open field to fight it. It is extremely helpful to place one teleporter in the arena and another in the nurse's house, so you can heal yourself. You don't need platforms in your arena because the Cosmic Car Key and the Shrimpy Truffle provide infinite flight.


 * Note that some of these items require rare drop(s) from the Martian Madness event

Gearing up
A set of Spectre Armor (mask version, as healing is disabled during the fight) or Beetle Armor will do well on him. Nebula Armor is also very effective against the Moon Lord. Also a good pair of wings such as Fishron Wings will help you dodge his lasers. For melee, equip a Flairon or another melee weapon with an equal or higher DPS rate. For a ranged weapon, a Phantasm Bow with Holy Arrows, or the Vortex Beater with Chlorophyte Bullets. Make sure you bring plenty of Greater Healing Potions. You may craft the Phantasm Bow and Vortex Beater by intentionally dying during the Moon Lord Boss fight to destroy the Vortex Pillar again when the event is reset.


 * Note that some of these items require rare drop(s) from the Martian Madness event.
 * A good idea would to use a 2 floor arena, with the 1st floor being platforms, the second made of thick blocks such as wood.This prevents his strongest attack, the Phantasmal Deathray, from coming into contact with your character. Run along the 1st floor constantly while spamming Vampire Knives, while wearing Beetle Armor, to heal while he attacks. A good weapon to assist would be the Solar Eruption,to blast through the thick blocks to hit his head.
 * It is best to first kill the head first, as it may be harder to damage later on.
 * REMEMBER:You have to kill all his body parts BEFORE you can damage his core.