Ostracised

First things first, make your way to the Bouleuterion in Athens. Here, you'll need to meet with Perikles's contact. Speak with the informant and get the lowdown on the ostracism.

After your chat, it's time to head over to the Logismos building, located in the Agora. Once you arrive, deploy Ikaros to scout the area. Make sure to tag all the guards you can spot.

The best entry point is from the western side. Jump the wall from here to get a good vantage point. You'll see two guards patrolling the courtyard. You can either use your ranged abilities to take them out from a distance or try to sneak up on them from the grass for a stealthy assassination.

With the courtyard clear, you'll find one more guard posted at the door leading into the building. Take him out to clear the path.

Inside the Logismos building, you'll find the Ostraka scattered on both the ground floor and the first floor. Grab them all.

Once you've collected both Ostraka, return them to the informant you met earlier. A cutscene will play, and you'll have a short window to chat with Socrates.