Behind the scenes
Noctocyanin is an item that appears in Metal Gear Solid V: The Phantom Pain. It allows the player to sense enemies and organisms for a brief time, even if they hadn't been marked beforehand.
- "Special medicinal plant blend that heightens awareness. For a limited time, makes user of nearby organisms without having marked them.
Use: [R3 stick]"
- ―Noctocyanin menu description in Metal Gear Solid V: The Phantom Pain