Itzak Meir, also known as Avenger, is a Mossad agent.
Through unknown circumstances, Itzak Meir joined the Mossed, where he gained the call-sign Avenger.
In 2003, Avenger tasked Benjamin Cohen to join Jack West Jr. and a coalition of small nations in restoring the ancient Capstone, because the Mossad knew that Jack would be more likely to accept Cohen rather than kill him on sight. Since Cohen's only way to be accepted into the team was to avoid communicating with his superiors, Avenger kept track of him via a tracking chip implanted in him.
When the Mossad felt that it was time to step in, Avenger led a team to Cohen's location in Iraq where the Hanging Gardens of Babylon were located. Barely arriving before the American forces, Avenger's team entered the Garden's entrance, and he had a sniper threaten Lily to ensure West wouldn't do anything foolish while Cohen told him how to cross a quicksand pit safely. Avenger then congratulated Cohen on his work, and proceeded to coerce the small coalition team to lead them to the Capstone Piece within, so that they could use as leverage over the Americans.
Once they retrieved the Piece, Avenger abandoned West and Pooh Bear and took Lily with him. However when she was trapped in quicksand, he decided to abandon her and ordered Cohen to leave her, but Cohen decided to stay with her. When Avenger's team reached their escape chopper, they found that Cal Kallis and his CIEF team had already disabled it. Kallis then took their Piece and executed Avenger and his team.