Wildfire
From superman.nu: Supermanica
Wildfire
Formerly known as "ERG-1", Drake Burroughs is a 30th Century Earth teenager whose body has been converted into a form of energy which he can release from a containment suit. As Wildfire, Burroughs is a (rather hot-headed) member of the Legion of Super-Heroes (first appearance: (as ERG-1) SB No. 195/2, Jun 1973: "The One-Shot Hero"; (as Wildfire) SB No. 202/2, May/Jun 1974: "Wrath of the Devil-Fish!").