Death Stalker

From publisher blurb: Michael Garfield is one of the world's deadliest assassins. He specializes in killing his targets with scorpion venom; earning him the name “Death Stalker.” (PL 10) Eventually, Death Stalker was captured by Recluse and sent to prison. There, he was contacted by the villainous, Kraken, who freed him and put him to work as the Cartel's top assassin.