Unique Skill Traveler allows the user to do instantaneous teleportation to a place where the user can 'sense' in some form or another within the confines of the world.
It was initially mistaken to be an ability that allows teleportation to a place where the user has been to before. However, this was later proven wrong because of humans' limited perception through sight. Since Rimuru has Universal Perception, he can easily go to a place as long as he can sense something from there.
It was also further misunderstood that the user is only able to teleport through space. But Ciel announced that it is a prototype for an ability that allows the user to travel to any point in space-time.
- Teleportation「瞬間移動 Shunkan Idou」: The ability to move instantaneously to any point in space and time.