Horizon Zero Dawn - First Modificaton - Trophy Guide
Full Trophy Guide Playlist: https://goo.gl/41DmCf
Horizon Zero Dawn - First Modification - Trophy Guide
Used a Weapon Coil or Outfit Weave on a modifiable weapon or outfit.
Bronze
As soon as you pick up a Weapon Coil (Green looted item) you can go to the Crafting menu, and then go to the Modify Weapon option. Once you select you weapon, you can assign the modifier to one of the slots. Shortly after that, the trophy will pop.
Congratulations