Here how to unlock Isu costume in Assassin's Creed Origins, one of the most prestigious super suits in the whole game.
To get this costume you will have to complete two simple steps: the first is to accumulate 50 pieces of silica, the second will be to complete the secondary mission: Bayek's promise, who will ask you to find 12 stone circles scattered throughout Egypt. Once you have found all 12 circles and accumulated the silica you will have to go to Giza, more precisely within the Sphinx. When you reach the main room inside the famous stone statue, you will find the Map of the Stone Circles which once activated will allow you to access the tomb of Eesfet Oon-m'aa Poo. Inside this tomb which is always located in the Giza area, you will find a luminous column that will be activated with the 50 pieces of silica. Once done, you'll get the coveted Isu costume.
Assassin's Creed Origins is available for PlayStation 4, PC and Xbox One.