He first taunts Blight as a ghostly voice in the bowels of the ship (using psychology as a weapon)...then a face-to-face confrontation with ol' skullhead. In that moment I wondered if Terry would let his thirst for revenge take over and wipe Blight out--certainly he would have every right to--but if Paxton hadn't interfered I think a cooler head would've prevailed. As Batman once offered to help Clayface become Matt Hagan again, Terry would have offered to help his foe, under the condition that he give himself up. Blight would have likely refused, and Terry wouldn't have pursued the matter or bothered to fight. He would have turned and walked away with a simple, "Your perogative, glowboy." That would be a fitting punishment for Blight...left to stew in his own juices, probably ending up dead in a matter of days, slowly poisoned by the radiation in his blood.