Slade Wilson (Earth-1: Pre-Crisis)

Slade Wilson, also known as Deathstroke, was the former friend of Oliver Queen. He was on Lian Yu. He turned on Oliver, becoming his enemy after he had taken Mirakuru. While on Mirakuru, he blamed Oliver for the death of Shado.

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