Zur-En-Arrh is both a location and a concept, seen and used primarily for Batman.
Zur-En-Arrh was the name of a distant planet. Here, a scientist called Tlano became the Batman from Zur-En-Arrh inspired by the Batman of Earth. When Zur-En-Arrh is attacked by robot invaders, Tlano teleports Batman to his planet to help him battle robots. While on the planet, Earth's Batman found he had "Superman-like" powers and helped Tlano defeat the invaders.
The phrase Zur-En-Arrh started appearing in Gotham City on the streets and dark alleys where Batman would capture some criminals like the Joker. The phrase continued to appear, usually as a background element graffiti, until Batman was attacked by the Black Glove and his mind was broken as a result of a past psychological trauma triggered by the Black Glove's leader, Simon Hurt. As Bruce's mind was wiped away, it was later revealed that he had created a back-up personality which had been stored on Bruce's subconscious for years and was triggered by the phrase, "Zur-En-Arrh". With this personality, Bruce became the Batman of Zur-En-Arrh, who was a psychotic version of himself, with visions of the imp from the fifth dimension, Bat-Mite, which was the representation of Bruce's last bit of sanity in his mind.
As the Batman of Zur-En-Arrh, Bruce was able to confront the Black Glove at Arkham Asylum, where they tried to keep a gambling game over his life. He also confronted the Joker, but was ultimately defeated and buried alive on the Asylum's graveyard. After this experience, Bruce's mind recovered naturally and the Batman of Zur-En-Arrh was eliminated from his subconscious as he confronted Hurt and the Black Glove until his apparent demise.
- Zur-En-Arrh was first created as the name of a planet in France Herron's 1958 story Batman - The Superman of Planet-X featured in Batman #113.
- The planet Zur-En-Arrh truly exists in the reality of Earth-One, but appears to be only a figment of Bruce Wayne's imagination in the reality of New Earth.
- No trivia.
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