Snatch is an ability that enables its wielders to "rob" physical objects and the abilities of other creatures, without making any actual or direct contact. "Robbing" objects seems to have the effect of stopping the particular object's motion, and also allows the wielder to grab and pull it; such an ability can be used to stop the usage of equipment during a battle.
One drawback is that while the weapons themselves become unusable, techniques that do not require motion are not restricted. Wielders are also able to basically steal the physical abilities of their opponents, including speed, stamina, and raw strength, and add it to their own, thus strengthening themselves and weakening their opponents. However, there is a limit to how much a person can steal from another before their body begins to deteriorate. An afflicted with Snatch cannot have their strength or speed be more than 10 times their normal maximum. If they begin to push beyond that, their body will fail, and death is all but immediate.