Certainly, I'll try to describe that in a language befitting the vividness of the prompt.

In a breathtaking display of artistic mastery, a vivid splash page springs to life, meticulously crafted in stunning detail. The canvas radiates with the brilliance of studio lighting, each brushstroke and digital rendering enhancing the mesmerizing allure of the scene.

At the focal point stands an enigmatic figure—a long-haired, fiery redhead of ethereal beauty. Her green eyes, vibrant and captivating, hold an air of mystery as her deliberately vague facial features invoke an enigmatic aura. Clad in an old Confederate cavalry jacket draped beneath a long duster, she exudes an intriguing blend of historical resonance and untamed spirit.

A battered Stetson hat perches atop her head, adding a rugged charm to her valiant demeanor. In her left hand, she wields an 1861 Colt navy cap and ball revolver, the details so intricately depicted that every notch and groove on its weathered surface tells a story of battles long past.

The ultradetailed portrayal lavishes attention on the figure's long, flowing locks, cascading down like a cascade of vibrant hues—a colorful tapestry of crimson that complements the scene's simultaneous contrast. Her face, perfection personified, carries an air of determination and resilience.

Rendered in a 9:16 aspect ratio, the full-body portrait resonates with the spirit of a valkyrie, evoking the mythical prowess and strength of a warrior goddess. The combined essence of Frank Frazetta's mastery, Boris Vallejo's vividness, Bernie Wrightson's meticulousness, Jim Lee's dynamic flair, and Marc Silvestri's finesse converge in this masterpiece, a testament to the pinnacle of artistic excellence and detailed CG unity. This artwork stands as an awe-inspiring testament to the skill and creativity of its creators.