Hookshot grappling hook similar to what Link owns.

Arcane magnetic gloves (instead of Electromagnetic they use magic as a power source).

Wrist blade like assassin's Creed or something similar. Hidden up your arm and concealed unless you're stripped naked. Maybe one in your boot, let's you always have a dagger on hand even when enemies think they've disarmed you.

Sticky powder as in some kind of substance that you throw up in a cloud and clings to people. Like dye but harder to get off. Use it against invisible targets. Suddenly they're visible.

Bolos, you throw them at their ankles and it wraps them up and reduces their movement to 0.

Super Lubricant it can be used to help you slip out of grapples or restraints, can help you squeeze through a small gap or even use it to fuck up enemies. Coat the doorway with it as they pour in and slip.

Fireworks are useful for any distraction or attention attracting thing.

Some kind of taser object. A once a day shocking grasp basically, makes it so enemies can't take a reaction for a single turn or something.