During the countdown, the screen will go dim and all objects and walls will oscillate back and forth, and then go back to normal, and the sound volume will gradually decrease, eventually becoming completely silent.
The status message ' Impending doom approaches.' indicates the Moon Lord's spawning countdown. The Moon Lord can be spawned by destroying the four Celestial Pillars or by using a Celestial Sigil in any world where Golem has been defeated. He is the final boss of the Desktop, Console, and Mobile versions of Terraria. Moon Lord is a Hardmode, post- Lunatic Cultist boss.
