The user can "halve" anything with a touch. The bigger the physical object, the longer it takes (scales progressively). Objects always get halved at exactly 50% of their mass. User has some amount of control how and where objects get halved. The user can halve anything weighing a couple of kilograms instantly. The user can also halve imaginary "concepts" or forces that affect objects and people, such as "This object's drag is only half" or "This person only uses half of their stamina when moving". They can have 2-5 ongoing halvings at a time. The more spesific and limited the halving, the easier it is to maintain.