There are many special achievements in "Assassin's Creed: Visions". The treasure hunter achievement is one of them. To do this achievement, you need to open a token box first. The token box is relatively easy to find. Explore various places. Sometimes you will encounter the kind of treasure chest that costs merchant tokens to open.
How to obtain the Treasure Hunter achievement in Assassin's Creed Vision
Treasure Hunter
The achievement requirement is to open a token box
When exploring various places, you will encounter treasure chests that are opened with merchant tokens (non-map collection elements), and you can obtain some strengthening materials