Slade Wilson (Earth-1: Pre-Crisis)

Slade Wilson, also known as Deathstroke, was the former friend of Oliver Queen during their time on Lian Yu. Wilson soon turned on Oliver, becoming his enemy after he had taken Mirakuru.

Biography
Desiring revenge from Oliver Queen for picking to kill Shado, Slade Wilson became a beneficiary of the Star City mayoral campaign of his mother, Moira, who welcomed him with a visit to the Queen Mansion. Wilson used the opportunity to reunite with Queen and meet his sister, Thea, deliberately making Queen aware of his return and to be vigilant of his family's safety. Queen summoned Team Arrow to intervene and walked Wilson to his car, while one of Wilson's men took out John Diggle, who had a headshot on Slade.

On December 10, 2019, he was killed along with the rest of the multiverse, by antimatter.