History Analysis / RequiredSecondaryPowers

** A way to deal with the wind. The faster you go, the more the wind affects you -- especially with airborne dust particles suddenly smacking your skin. You'd have to be NighInvulnerable or have regenerative powers. (ComicBook/{{Storm}} explicitly has physical resistance to the elements and temperature extremes as part of her WeatherManipulation power set; otherwise, she should look a decade older.) Eye protection is particularly key; notice how all those open-cockpit {{Ace Pilot}}s wore a set of cool goggles, as it's hard to see otherwise with the wind and the particles whacking you head-on. Also, if you're flying really fast, you have to worry about the heat and the shockwave you create -- some means to prevent your violent pass through the atmosphere from replicating TheTunguskaEvent. It works much like the secondary powers required for SuperSpeed, but with the wind being even more violent at altitude.

** Super stamina. A normal human can run upwards of 15 kilometers per hour, but that uses up stamina faster than walking. It follows that a human with super speed will need increased stamina to maintain supersonic velocity.

** High-altitude survival powers. Oxygen is thin in the upper atmosphere, so if you want to go up that high, you need a way to breathe. Humans can only go up 8,000 meters above sea level before reaching the [[IDontLikeTheSoundOfThatPlace "death zone"]], where prolonged exposure will lead to hypoxia, then unconsciousness, then death. If you want to reach those altitudes without an external breathing apparatus, you'd need [[BlowYouAway breath powers of some sort]], either in extracting more oxygen from the surroundings or by just not needing as much oxygen to begin with (which might even allow you to [[BatmanCanBreatheInSpace breathe in space]]). You also have to be cold-resistant to deal with the colder temperatures at altitude (let alone {{space|IsCold}}).

** A way to generate cellular mass. It's a similar problem to ShapeshifterBaggage; if you want super healing, you need to get some body mass from somewhere, ''especially'' if you're trying to regrow missing limbs or organs. Cells can't generate this much mass on their own; the number of times they can divide is bound by the [[https://en.wikipedia.org/wiki/Hayflick_limit Hayflick limit]], beyond which organs cannot replace dying cells. If you don't ignore the limit, your healing factor is basically CastFromLifespan.

* '''{{Immortality}}:''' First, you'd need to define ''how'' you're immortal. After all, you could have AgeWithoutYouth, or [[ImmortalityHurts immortality without invulnerability]], or ResurrectiveImmortality. Each of these have their own limitations which bring up interesting questions. Like, can you still reproduce? The human ovaries have a finite number of eggs which cannot be replenished; if you want to bear children when you're ReallySevenHundredYearsOld, you'd have to fix that. Or, can you still get cancer? Since cancer is essentially an erroneous mutation, if you're immortal, you're going to get it eventually. But the biggest and most obvious required secondary power for immortality is ''mental fortitude''. After all, WhoWantsToLiveForever There are all sorts of consequences that your ''powers'' can deal with, but not your mind.

* '''NighInvulnerability:''' You can't keep it on ''all the time''. Even if your invulnerability is limited to [[NoOneCouldSurviveThat survival]] and not [[SuperToughness actually being able to withstand an attack]], there are some applications where your body ''needs'' to be "vulnerable"; otherwise, things like injections, surgeries, even possibly more mundane things like eating would be impossible. One way around this is to be only NighInvulnerable on the skin, like ''Series/{{Luke Cage|2016}}''.

* '''GreenThumb''': Can you grow poisonous plants? Similar to a PoisonousPerson, you better be immune to the poison, because there are some lethal effects of poisonous plants just from the mere exposure. You would also have to be really familiar with the types of plants you’re working with, or something might backfire. And if you are trying to make plants grow in a dry desert or break out of concrete, you better have a lot of energy to make the plants be able to grow and sustain themselves for any offensive prowess. Oh, and hopefully you don't have any pollen allergies.

* '''TimeTravel:''' While many time travelers are ordinary people who just happen to have a super-cool TimeMachine, many of the things they may need to prevent themselves from going crazy can essentially be superpowers. RippleEffectProofMemory is a superpower; it allows you to keep track of what's changed from one timeline to the next, even when no one else can. Immunity to {{Temporal Paradox}}es is a superpower; you can prevent yourself from being RetGone. Recognition of TemporalMutability can be a superpower; depending on how time travel works, you might be able to tell whether or not a given change is going to have wide-ranging consequences. Even being an important figure to history can be a superpower, in the sense that the timestream itself will act to preserve your existence, or at least your impact on it (a power which, sadly, seems only to work if you're [[HitlersTimeTravelExemptionAct Hitler]]). And this is before all the mental resilience you need to be a time traveler, dealing with such gripping issues as TheTimeTravelersDilemma to such mundane issues as jet lag (time zones are a thing!) and TimeTravelTenseTrouble. If your time travel mechanism works like {{Teleportation}}, that has its own range of required secondary powers that we'll get to in a little bit. (If you were a time traveler, you'd have seen that coming.) Furthermore, the Earth moves at roughly 30 kilometres per second relative to the Sun, the Sun and everything orbiting it moves hundreds of kilometres per second relative to the galactic core of the Milky Way, and the Earth itself rotates at hundreds of metres per second at the equator, but not all parts of the Earth rotate equally fast. A person on Earth doesn´t notice as they move along with Earth and the point on it they are at and maintain their velocity, but a time traveller would have to also move through space just to keep up with their destination.

** A means of quickly replenishing whatever it is you use to make the duplicates, especially if it comes from your body. As [[WesternAnimation/TeenTitans2003 Billy Numerous]] can attest to, spreading yourself too thin will put you in a bind when it counts.

* '''SuperSenses:''' You need a way to apply them selectively. Otherwise, you'd experience SensoryOverload. It's actually quite common for heroes to [[HowDoIShotWeb struggle to develop this secondary power]]; in RealLife, [[http://www.independent.co.uk/news/science/man-blind-for-40-years-tells-of-struggle-to-adapt-537009.html people who pick up a new sense have a hard time adjusting to it]].

** A way to deal with ShapeshifterBaggage. If you're transforming into something more massive than you were before, where does the extra mass come from? If your target is less massive, where does the extra mass go?

** SuperStrength. There's no other way around the SquareCubeLaw -- if you want to be twice as big, you need to be four times as strong. You'd also have to deal with the RubberMan problem of your heart being able to pump hard enough to reach extremities that are twice as far away from it as they were before.
** A way to regulate internal body temperature. At small sizes, you'd risk freezing to death. At large sizes, you'd risk death from heatstroke. This is another consequence of the SquareCubeLaw; if you were twice as big, you'd be '''eight''' times as heavy, but only have four times the surface area, meaning you'd be generating that much more heat and have less surface area to expel it.

** Super stamina. No matter how fast you're running, you need to be able to keep up. If you're using your super speed to run ridiculous distances, then you'll absolutely need some kind of super stamina.

** Super concentration. If you want to have any way to use your power at all (usually through SuperReflexes), you're going to end up perceiving normal speed as horrifyingly slow. Imagine all the things you can see all of a sudden, like the refresh rate of a computer monitor. This is going to wear on you mentally, tremendously, if you can't turn off your TimeDissonance somehow.

* '''[[MakeMeWannaShout Sonic Powers]]:''' You'd need SteelEarDrums (so that you wouldn't be affected by your own powers), super organs (that can ''produce'' such sounds without being affected by them), and super focus powers (to prevent the sound from just rattling off in every direction). This is especially true if you're underwater, since sound travels better through water than air. You'd also need an indestructible skeleton, since your voice reverberates throughout your body whenever you talk[[note]]Every action has an equal and opposite reaction after all.[[/note]], so having noise equivalent to an explosion going through your whole body is not going to be pretty.

** In regards to {{Animorphism}} you also need to familiarize yourself with the various different anatomies of the animals you're turning into and their movement controls, or it becomes a HowDoIShootWeb scenario. Turning into a hawk isn't as cool if you don't know how to fly. Also, if cold-blooded animals such as reptiles, amphibians or fish are part of the shifter list, you need to find ways to regulate your temperatures if you don't want to be disabled by cold weather.

** A means of quickly replenishing whatever it is you use to make the duplicates, especially if it comes from your body. As [[WesternAnimation/TeenTitans Billy Numerous]] can attest to, spreading yourself too thin will put you in a bind when it counts.

* '''GreenThumb''': Can you grow poisonous plants? Similar to a PoisonousPerson, you better be immune to the poison, because there are some lethal effects of poisonous plants just from the mere exposure. You would also have to be really familiar with the types of plants you’re working with, or something might backfire. And if you are trying to make plants grow in a dry desert or break out of concrete, you better have a lot of energy to make the plants be able to grow and sustain themselves for any offensive prowess.