Blackbriar Thorn (Earth-2: Post-Crisis)

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

- Stargirl and S.T.R.I.P.E.

Blackbriar Thorn was an enemy of Green Lantern and a former member of the ISA.

Biography
At some point, Blackbriar Thorn battled the Green Lantern and the JSA for multiple occasions, causing his arrest by the Twin Cities Police Department until he was later destroyed in 1988.