Time Gates appear whenever there is a distortion in time, but each gate can only be accessed with a specific artefact. Each artefact is indicated by an objective marker on the map, as each is required to advance the story. Wild Artefacts almost always unlock gates leading to optional locations, and therefore must be searched out by the player. Since artefacts are not supposed to exist, due to being formed when two timelines collide, they can only be uncovered by use of the Moogle Hunt and Moogle Throw commands.