The phrase "and becomes instead" is correct and usable in written English.
It can be used to indicate a change or transformation from one state to another, often in a contrasting manner.
Example: "The project initially aimed for sustainability, but it becomes instead a focus on profit maximization."
Alternatives: "and turns into" or "and transforms into".
If she herself becomes mortal, then she loses her power of speech and becomes instead a spirit of death.
"Once music ceases to be ephemeral – always disappearing – and becomes instead material… it leaves the condition of traditional music and enters the condition of painting.
It is a time of overstuffed and underlong trains, of holiday shopping bags and jabbering children, when the commute stops being a blessedly forgettable transition between work and home and becomes instead an overbooked cruise through the straits of Purgatory.
It ceases to be a spiritual solvent of material conflicts, as it was in days of Matthew Arnold and TS Eliot, and becomes instead the very terms in which those conflicts are articulated.
History itself stops being linear, and becomes instead a sort of cubist affair, with peaks and troughs of civilisation and great leaders from different cultures and epochs (ancient Chinese, Renaissance Italy, medieval France, fascist Europe) existing together, joined across centuries and made to rhyme in Pound's mind.
They will often be delighted: "The pig is not really a suitable animal for nativity scenes, it lacks a sheep's elegance, thick coat, soft woolly caress, pass me my ball of yarn, will you, darling, such creatures are made to bend the knee, whereas the pig rapidly loses its sweet look of a pink, newborn bonbon and becomes instead a bulbous-nosed, malodorous lover of mud".
He stopped being a believing Muslim and became instead an apostate.
At that point, she had ceased being a subject of study and became instead a person in my life.
But just when did attending a fashion show cease to be a pleasure and become instead a chore?
He said Memorial Day long ago stopped being a memorial, and became instead the front door to summer.
Consequently, her interpretations cease to simply be demonstrations of the subjectivity and instability of translation and become, instead, instrumental and crucial to the fate of all three characters.
