The Twins Have Awoken

The Twins Have Awoken is a painting. It depicts a Hallowed Armor-wearing player being startled by The Twins. It can sometimes be found in the Dungeon.

Trivia

 * Retinazer appears to have a blue iris, instead of his usual red one.
 * The tooltip is a reference to one of the console Terraria developers.
 * The Fact it's found in a pre-hardmode area, it may be foreshadowing to players who have never played terraria before