Arcane Controller

This ancient runic device, covered in symbols and with a dark blue gemstone on top, is roughly as big as a knife, yet lacks any blade. Strange blue humming comes from it when you activate it. 

This magical "wand" can trigger or take control of any arcane constructs, devices, or effects created via casters or individuals. It can not dispel or control living vessels, draconic magical effects, or breath weapons. Using this, you can unlock magically locked doors, take oven golems or constructs made via arcane means, or undo magical effects you can see.

You can cast as an action, Dispel Magic, costing one charge. The Arcane Controller has 12 charges in total. All charges are regained after a long rest. To take over a magical effect, you must spend a charge and make an Intelligence Check, and try to get over a set DC by the DM. For taking over golems, it is a contested check, your intelligence vs their Wisdom.