The Long Game

You'll start by heading to the Sanctuary of Olympia after a suspected poisoning of Alkibiades during a banquet. Your first task is to investigate the scene. Go to the building located in the southwest part of the sanctuary. Once inside, carefully inspect any items that have search icons on them.

After finding clues, you'll discover the name of the merchant who delivered the poison. Your next step is to pay this merchant a visit. You'll find him in a room situated southeast of the main banquet area.

As you approach the merchant's room, be ready for an ambush! A cultist guard will attack you. It's crucial to take this fight outside the room. This is to avoid accidentally harming Priam, the merchant, who is inside. Focus on single, deliberate attacks to ensure no civilians are caught in the crossfire.

Once the guard is dealt with, speak with Priam. You'll have a choice here: you can either spare him or kill him. Regardless of your decision, make sure you get the information you need about the antidote before you act. Priam will tell you that the antidote can be found at Fort Koroibos, which is located northeast of where you just fought the guard.

Now, make your way to Fort Koroibos. Upon arrival, use your eagle, Ikaros, to scout the area. Identify the exact location of the antidote and pinpoint any guards nearby that you'll need to avoid.

To make infiltration easier, you can meditate until nightfall. The antidote is located in a tower right in the center of the fort. The best way to approach it stealthily is by using the foliage that starts along the southwestern wall.

Crouch and move through the grass, staying hidden from the guards' line of sight, until you reach the tower. Enter the tower through the gap in the wall on the northeast side. The antidote will be inside, in a treasure chest.

With the antidote secured, exit the fort the same way you came in and return to Alkibiades. Administer the antidote to him, and the quest will be successfully completed.