Blackbriar Thorn (Earth-2: Post-Crisis)

"Blackbriar Thorn. Uh, Green Lantern destroyed him in '88."

- Courtney Whitmore and Pat Dugan

Blackbriar Thorn was an enemy of Green Lantern and a member of the Injustice Society of America.

Injustice Society of America
At some point, Blackbriar Thorn became a member of the Injustice Society of America, causing his arrest by the Twin Cities Police Department. In 1988, he was destroyed by Green Lantern.