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 until he was destroyed in 1988.