Dungeons & Dragons 5e Element 133 Class Feature: Material Sensitivity

Gain proficiency on Investigation and Insight checks, if you already have proficiency double your proficiency bonus. Additionally, you've gained a curious ability to sense and focus on particular materials.

You may use this feature once after completing a long or short rest. Closing your eyes, and placing two fingers on your third eye, you pick a specific material your mind wants to focus on. You send out an arcane pulse that detects objects containing that material within a 100-foot sphere surrounding you. It must be a material you’ve encountered before in the past and have a clear idea of what it is. It must be a tangible object, like air, water, dust, stone, vegetation, flesh, etc. It can’t be something that isn’t an object, like a vacuum or a shadow. And it can't detect a specific creature, only parts of them. Materials will appear as bright lights against a black background with white outlines of other objects.

After finishing a short rest, you can change your desired material.