Gearhead

You have a knack for understanding and tinkering with mechanical devices, allowing you to repair, modify, and even create contraptions.

• You gain proficiency in Tinker's tools.
• You can spend 1 hour and 10 gp worth of materials to create a Tiny mechanical device (AC 5, 5 hp). The device ceases to function after 24 hours (unless you spend 1 hour repairing it). This device can be increased in size category by doubling the amount of resources invested per size category increase. This device doubles in HP per size category. This device can perform a single function for the entire duration it is active but can be reconfigured for one of half of the creation cost. 
• You have advantage on Intelligence checks to understand the workings of mechanical devices or to disable traps that utilize mechanical components.