What does “This is going to be a terrible night” mean in Terraria?

This message signals the start of the Twins boss fight at night after using a Mechanical Eye.

It is one of the Hardmode mechanical bosses and spawns naturally after defeating a few enemies post-Wall of Flesh.

The Twins consist of Retinazer and Spazmatism and have distinct attack patterns.

Players should be well-prepared with mobility accessories and ranged weapons to survive the battle.