Cecil Adams

Cecil Adams, self-styled Count Vertigo and formerly known as The Count, was the dealer and creator of a drug called Vertigo. He received his original nickname because his first customers, or "victims", were left with a mark by the injection of the drug on their neck, shaped like a vampire's bite. The Count was killed by Oliver Queen as the drug dealer tried to murder Felicity Smoak. Werner Zytle would later take up his mantle under the name "Vertigo".