Luminosity N/A Planets Moons 0 Asteroid Belts 0 Asteroids 0 Objects 0 Location: Milky Way / Shadow Sea / Iera Iera is a medium system with four . Prerequisite: Horizon (mission) (Mass Effect 2) Prerequisite: Priority: Thessia (Mass Effect 3) It is a gateway system; however, unlike most other gateway systems, this system has no fuel depot. Iera (ιερά) is Greek for holy, or sacred.