Contrary to what many people think, you’re not going to find Lunar Moon by playing normally. In order to summon Lunar Moon in Minecraft, you must create a new world and use the correct seed: Lunar Moon or Lunae (łûńæ). One of the two should work for you.

Just wait for nightfall and you should have no trouble seeing the giant moon in the sky. Or maybe you won’t have time to see it before it starts raining fireballs and the whole map is on fire.

Don’t try to survive the night without first having a good preparation.On the other hand, if what you want is not a combat, but simply to see the Lunar Moon, you can use a texture pack. The moon that will appear will be harmless, it is just a visual change.

Texture pack