You get this by crafting items using either the Blacksmith or the Jeweler.
The Blacksmith unlocks very early in the first act. Once he has unlocked you can salvage blue, yellow, or orange items to get the materials you'll need to craft items. Once you have salvaged enough items you can craft five items and this trophy will pop.
You will get this in the normal course of game-play unless you avoid Blacksmith and Jeweler crafting entirely.