Harbyr.

A device that rests against the sternum, rooting into the skin upon activation. Its roots grow through the skin, creating a visible pattern resemblant of a tattoo across the person’s chest, which glows in a pulsating pattern with the magic that flows through it. The roots attach themselves to the lungs, working with pulses of magic which respond to signals from the body and work to stabilise breathing, clear the lungs, and act quickly in response to asthma symptoms.

Though created originally for asthma, many use this device to help with panic attacks and even whilst exercising, though this is not recommended.