What is empress of light?

The Empress of Light is a boss in the popular video game Terraria. It is a very challenging boss to defeat, and can only be fought during the day. The Empress of Light is unique in that it has three different phases, each with its own set of attacks and abilities. It is also very fast and agile, making it difficult to avoid its attacks. Defeating the Empress of Light rewards the player with some of the most powerful items in the game.