A Rikti Certificate
Of all the things you've done, you never thought you'd find yourself working with a Rikti. The alien invaders nearly brought the world to it's knees in the war, but that was a few years ago, and now, this Ambassador Kuhr'Rekt seems to be an okay guy. While you still can't read the alien language of the certificate he handed you, it's nice to know that the Rikti think you understand:
Your first job with Ambassador Kuhr'Rekt sent you against the Council. The Ambassador explained that the Rikti on Earth were split into two factions, Militaristic 'Restructurists' like himself, and more peaceful 'Traditionalists' who were trying to negotiate with the proper authorities in Paragon City. Kuhr'Rekt explained that his mission was to disrupt those negotiations while he was negotiating with Arachnos for his own side. Kuhr'Rekt had learned that the Council had seized some Rikti weapons belonging to the Traditionalist rivals, and wanted you to get them.
With the other factions weapons in hand, it was time to embark on some ultraviolent sabotage! Kuhr'Rekt asked you to cut loose and wipe out a Longbow base using the alien weapons, and you were only too happy to oblige.
The final step was for you to take out a Traditionalist Rikti outpost with your super powers, giving the Traditionalists reason to think that Longbow's metahumans had attacked them.
By the time you were finished, negotiations between the heroes and the Traditionalists were set back months, and Kuhr'Rekt couldn't have been happier. It's kind of nice to know that alien politics are just as dirty as human politics.