But it is even so; the fallen angel becomes a malignant devil.
I was now about to form another being of whose dispositions I was alike ignorant; she might become ten thousand times more malignant than her mate and delight, for its own sake, in murder and wretchedness.
There are no more uses of "malignant" in the book.
Show samples from other sources
Gey and his wife, Margaret, had spent the last three decades working to grow malignant cells outside the body, hoping to use them to find cancer’s cause and cure.
Rebecca Skloot -- The Immortal Life of Henrietta Lacks
He hit it [the shark] without hope but with resolution and complete malignancy.