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Slade Joseph Wilson, better known as Deathstroke, is the world's deadliest assassin and mercenary-for-hire. He is one of the greatest adversaries of the Batman, and an ally of Lex Luthor.
Deathstroke was invited to Lex Luthor's private yacht after the latter had broken out of Arkham Asylum. Lex talked about Superman's return and the formation of the Justice League. Slade arrived, removing his mask, and warned that Lex shouldn't have invited him if all he was going to do was waste Slade's time with conversation. However, Lex justified this by suggesting that they "even the playing field" by creating a 'League' of their own.
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As an assassin, Slade Wilson is cold and irascible, being more than willing to leave Lex Luthor's yacht when he thought the latter was wasting his time, but seemed far more interested after hearing his proposition.
- Peak Human Condition: Slade Wilson, as a tremendously skilled and experienced assassin, is in peak physical condition. While not fully superhuman, Deathstroke's extremely muscular and athletic physique make him immensely physically powerful by normal human standards.
- Master Martial Artist: Wilson is a tremendously skilled armed and hand-to-hand combatant.
- Master Swordsman: Wilson is an extremely formidable swordsman, with him actively employing a sword as part of his arsenal.
- 'Deathstroke' Armor: When in the field, Deathstroke always dons an orange-and-black mask and bodysuit.
- Sword: Wilson actively employs the use of a sword as part of his arsenal.
- Deathstroke, Superman, and Lex Luthor all have the same middle name, Joseph.