My Golden Finger Is a Thief

If they can take advantage of the system, why can't they take advantage of their system? For example, when they are about to complete a task, create an "accident" for them to fail. Or, use the rules of their system's operation to gain some convenience for yourself - such as using the light of the [Material Identification System] to quickly find valuable monster materials. For example, using the [Beast Taming System] the host's spiritual pet to lure away some troublesome monsters.