The advent of some mutant abilities has created whole new categories of criminality, while other powers are covered by existing laws. It’s still aggravated assault with a deadly weapon if you threaten someone with a sharp blade, even if you grew that blade yourself using your Natural Weapons ability. Some of the more obscure legal interactions that might crop up in your Mutant City Blues campaign…

The use of the Cognition power is treated as card-counting in Mutant City casinos; it’s not technically illegal, but those known to possess the power are banned by the casino owners and forcibly ejected if found to be gambling.

Of all the Command powers, Command Insects is the most likely to cause serious property damage or degrade the ecology of the local area. A common use of the power is the so-called ‘Pied Piper’ effect – instead of spraying a structure for termites or other insects, a mutant can just compel the insects to leave. Practising this form of extermination commercially requires a licence, and proof that the mutant has somewhere to safely dispose of the insects.

Using Earth Control’s earthquake ability is a legal nightmare, exposing the user to endless suits for damage to property. Earthquake-hit structures must be thoroughly examined by a qualified engineer to ensure they are still sound.

Illusion is a tricky power when it comes to the law. Many uses of illusion fall under existing laws covering fraud, deception, intimidation and so forth – there’s no difference, legally, between conjuring an illusion of a monster, and putting on a monster costume to scare someone. However, as illusions leave no traces or physical evidence, it makes proving a crime considerably harder. Attempts to have non-consensual, non-declared illusions deemed illegal have foundered in the courts, and there’s a growing number of professional illusionists who use their abilities for quasi-legal activities like providing alibis (‘six witnesses saw my client drinking in the bar when the prosecution claims he was robbing the house’).

Plants under Plant Control count as tools or weapons, so using a plant to entangle someone counts as assault even if you never lay a finger on them. That said, it can difficult to conclusively prove that a particular plant controller was commanding a particular plant, leading to the trope of the ‘Mad Gardener’, a hypothetical plant controller who wanders around Mutant City controlling plants at random, and who just happened to be passing when the defendant was alleged to have used the same power.

Reduce Temperature can result in reckless endangerment charges if the mutant uses the ability in an enclosed space with others present.

Speed limits do not apply to runners or cyclists, so the Speed power is not restricted. However, using Speed in highly trafficked areas may result in charges for jaywalking.

Webbing counts as littering.