A Holy Hoard is an Enigma in Assassin’s Creed Mirage.
You’ll need to find the location of the reward shown in the map.
Here’s the location and guide of A Holy Hoard in AC Mirage.
How to find the Enigma
Before you begin, you need to collect the Enigma from Harbiyah. The location is provided in the map below.
It’s west of Prince’s Gate.
Enter the building and collect the Enigma.
It’ll then appear in your inventory.
Open it and you’ll see a map.
Location of A Holy Hoard’s reward
Now, head all the way northeast of Harbiyah. The exact location is shown in the map below, marked by the player location.
Zoom in and you’ll see it’s east of the Nestorian Monastery.
Go to the marked place and you’ll see a big tree. The reward is just in front of the tree.
You’ll receive a Tan Abbasid Knight outfit dye.