"vital power" is correct and usable in written English.
It can be used as a noun to refer to a form of strength or energy that is necessary or essential to accomplish a goal. For example, "The students worked hard to find the vital power they needed to pass the test."
"I wanted very young, vital power," Mr. Barba said.
"In the late 1970s, fashion had a vital power in Japan and many talented Japanese designers emerged," she said.
Humans are, for most of the biblical writers, "a unit of vital power," not a dual creature separable into two distinct parts of unequal importance and value.
This is a vital power for the regulator to make sure markets work well for consumers, so that it is able to meet its statutory objectives.
Even further back, journalists predicted that, during a 1968 demonstration against the Vietnam war, protesters would seize Broadcasting House and other vital power centres.
Protection orders will give courts the vital power to stop children from travelling if there is evidence they may be at risk of FGM.
This means local authorities face further financial pressures and will lose vital powers once granted by the Localism Act.
Free Flight into the Wordless He selected who arrived, sent a messenger – His vital powers, his own lot, should turn him gradually.
The original purpose of these activities was to purify, avert malicious influences, renew society, bridge over critical moments, and stimulate or resuscitate the vital powers of nature (hence the term utsava, meaning both the generation of power and a festival).
But, as is true of other great activities of the state and national governments, the fact that we are a federalism raises problems regarding these vital powers of taxation.
The Belgian chemist Jean Baptiste Van Helmont believed that you should allow the brain matter to dissolve into the skull, which – nicely marinaded over time – then absorbed the body's vital powers.
