The preview of episode 18 of Arrow Oliver and Slade finally battle out and it seems like Oliver might win this one.

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In the clip for the episode, titled Deathstroke -- the alias for Slade--, things spin out of control for Oliver as his arch enemy strikes with a deadly vengeance. Slade is seen wreaking havoc and endangering the lives of Oliver's family members. Slade seems to have kidnapped Thea, Oliver's younger half-sister. The tagline for the clip runs: "Get Slade or get slayed."

In the final moments of the clip Slade is seen confronting Oliver, teasing him saying, "What are you going to do? Kill me?"

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In a split second we see Oliver taking a shot at Slade with his arrow, which gets the antagonist right in the neck, knocking him to the ground.

Here's the official synopsis for the episode:

"In the Deathstroke episode of Arrow, Slade (Manu Bennett) makes his move against Oliver (Stephen Amell) and the repercussions are enormous. While Oliver scrambles to protect his family, a key player in his team starts to question Oliver's decisions. Meanwhile, Isabel (guest star Summer Glau) makes her move to take Queen Consolidated away from Oliver."

Watch the preview here:

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Arrow Season 2