'wondrous power' is correct and usable in written English.
You can use it to describe something that has been imbued with incredible strength or potential. For example: "The magical staff gave the wizard a wondrous power."
They believed that the wondrous power of God alone would create the new time.
When Tomorrowland opened in the 50's at Disneyland, it was a romanticized vision of the wondrous power of technology; there was even a plastic house.
About 1630 the French mathematicians Pierre de Fermat and René Descartes independently realized that algebra was a tool of wondrous power in geometry and invented what is now known as analytic geometry.
Behold, the wondrous power of the domesticated muse, also known as the cat.
Yet the convergence of fashion and high technology is leading to new kinds of fibres, fabrics and coatings that are imbuing clothing with equally wondrous powers.
Millions of "committed vegetarians" and "ethical vegans" strive to cause as little suffering and environmental damage as possible, and are especially aware of the wondrous powers of plants.
Jesus in contrast to John the Baptist (a preacher of repentance who pointed to the coming bringer of the Kingdom)—knew himself to be the one who brought fulfillment of the Kingdom itself, because the wondrous powers of the Kingdom of God were already at work in him.
SIR The wondrous powers of Apple's dual-processor machines with the Be operating system, as described in your story, duplicate what is already possible on Intel machines running Windows 95.
As Gandhi and Martin Luther King demonstrated, nonviolence has wondrous powers.
And the message of the film, though bleak about our trajectory toward the destruction of our own planet, is full of hope that the human mind and heart are the most wondrous powers in the universe.
One bravura flourish, a slow and sweeping pan shot from a roof deck, embraces the city's wondrous workaday power even while infusing it with its accomplished residents' doubts and longings.
