So my character has a power amplifier. It's a physical object which she wears around her neck and must be in her possession in order to work. It does two whole things: amplifies the strength of a person powers and turns you into a dragon if swallowed.

How would this be handled? (Don't worry about the dragon part.) Will it be able to work as normally, with limits on how much it can amplify someone's powers?

My current thought is that it will work as normally and be able to buff the potency of Zelda's tattoo magics. However, Zelda will have to retrieve it with the rest of her clothes and stuff. Alternatively, I would also be down for her needing to "unlock" its power amplification somehow.