History of character is unknown.
- This version of Sabre, including all history and corresponding appearances, was initially erased from existence following the collapse of the original Multiverse in the 1985-86 Crisis on Infinite Earths limited series. However the ending of Convergence retroactively prevented that collapse saving all the alternate realities though in an "evolved" form. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 4 Appearances of Jonathan Zero (Earth-One)
- 1 Images featuring Jonathan Zero (Earth-One)
- Quotations by or about Jonathan Zero (Earth-One)
- Character Gallery: Jonathan Zero (Earth-One)
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Swamp Thing and is predominantly seen in the Swamp Thing family of titles. This character may be part of the Swamp Thing's supporting cast, a minor acquaintance, or one of his adversaries. This template will automatically categorize articles that include it into the Swamp Thing Characters category.