Clockwork scavenger

You have dedicated yourself to hunting down mechanical constructs for permanent deconstruction. Your skill in foraging for scrap allows you to craft mechanical devices and powerful weapon modifiers to help in the hunt, using your favored enemy's strength against them. This was created by gamingbrew. Found on dndbeyond and patreon.

Modified tech

At 3rd level, choose one of the modified tech choices below. You can change your modified tech choice when you finish a long rest by spending 10-minutes creating or replacing your previous modified tech. You can only have one modified tech active at a time.

Electric Discharge: Attach the electric discharge to any Firearm. When you hit a construct using this weapon, as a reaction you can scramble it's senses. The damaged construct has disadvantage on its next attack roll. You can use this feature a number of times per day equal to your proficiency bonus, regaining all uses after a long rest.

Recon Drone: A tiny drone acts as a lookout hovering above you. The drone will fly high in the air surveying your surroundings, granting you advantage on initiative rolls and Wisdom (Perception) checks.

Sensor Overlay: As a bonus action, a specialized eyepiece allows you to mark a target within 90 feet. You can move your mark to a different target with a bonus action. The Sensor Overlay shows any damage resistances or immunities the target may have. Additionally, you can overload the Sensor Overlay granting yourself advantage on your next weapon attack against the marked target. After overloading your Sensor Overlay, it ceases to function and becomes unusable for 10-minutes.

Overcharge

At 7th level, you've attached modified braces to your legs allowing you to push your body to new limits. After spending all of your movement in a round, as a bonus action, you can move an additional 10 feet. Moving in this way ignores difficult terrain and doesn't provoke opportunity attacks. You can use this ability a number of times equal to your proficiency bonus, regaining all uses after a long rest.

Portal Gun

At 11th level, you can quickly open two small portals on solid surfaces to make creative weapon attacks. A portal opened in this way is only active for a brief moment and only weapon attacks can pass through. Once per round, you can use Portal Gun to make a melee attack against a target within 30 feet of you as if you were next to the target or you can make a ranged attack against a creature behind covered within 30 feet of you, as if the creature didn't have cover. As a reaction on a friendly creature of medium size or smaller's turn, you can provide them with the use of the Portal Gun instead, if they choose.

Enhanced Body Armor

At 15th level, you've attached an elemental shielding system to your body, which forms a translucent shield that protects you from harm. Gain resistance to one of the following damage types: acid, cold, fire, lightning, poison, or thunder. You can change your damage type choice with a bonus action.