If you are looking for text to accompany a 1920x1080 wallpaper of this painting or fan art, you can use the iconic in-game status message that appears when the boss is about to spawn naturally: Other thematic text options include:
(A common community quote referencing the boss) 1920x1080 The Destroyer Painting : Terraria
The is a 6x4 painting in Terraria that depicts the mechanical boss of the same name. It can be found in Dungeon chests or hanging on Dungeon walls. In-game, the item features a tooltip crediting the artist R. Moosdijk . If you are looking for text to accompany
(A reference to its mechanical worm nature) 1920x1080 The Destroyer Painting : Terraria
(The material dropped by the boss upon defeat)