Eye of Etheria

Eye of Etheria is a Hardmode accessory dropped from Eye of Cthulhu when defeated in the Etherial Dimension. It allows the player to see non-Etherial NPCs when in the Etherial, and Etherial NPCs when in the Overworld, when equipped. NPCs revealed in this way cannot be damaged by the player, but can be interacted with by right-clicking. This allows the player to talk to and shop from town NPCs even when in the Etherial.