Agent X-13. Its protectors include a group of mutant adventurers and consulting detectives known as the X-Society.
- As there was also in this world an unidentified levitating mutant following the Subject X, we can supposed there is also a Forge on this world, or another person taking care of this Secret War using mutants.
- An alternate and/or future version of this reality exists under the form of Earth-52012.
- Characters from Earth-889
- Other things related to Earth-889
- Earth-889's Appearances
- Media Earth-889 was Mentioned in
- Images from Earth-889
- Reality Gallery: Earth-889