Earth-25

Earth-25 is a reality in the multiverse.

Setting
On Earth-25, all humans are capable of harnessing to some degree or another, one of the five classic Chinese elements of fire, water, earth, metal, and wood. However, for many this elemental control is extremely minimal. For example, most Pyromancers can only produce a few sparks and that's it. On the other end of the spectrum, some can unleash firestorms capable of burning almost everything in their path for literally miles and with temperatures hot enough to melt rock and even metal. But these are the outliers. With some of the more powerful ones abusing their power though, others who do not take it upon themselves to defend humanity from those unscrupulous individuals who would use their power to conquer and oppress.

The wielders of the five kinds of elements are identified as such: Pyromancers (Fire), Hydromancers (Water), Geomancers (Earth), Metalmancers (Metal), and Woodmancers (Wood).

Trivia

 * The premise of this Earth is similar to the world of the cartoon series Avatar: The Last Airbender. The author has confirmed that this was intentional, this Earth being effectively a parody of that setting.
 * Likewise, one of the main heroic groups on this Earth are a reference to the DC superhero team The Metal Men, who likewise each represent a different type of metal.
 * This Earth's number (25), is divisible by five, ends with a five digit, and is also the result of five being multiplied by five. This is all in reference to how the five Chinese elements are harnessed by this Earth's humans.