In literature, the term malignant is employed to evoke a sense of deep-seated, often insidious evil that manifests in both character and circumstance. It describes not only the overt cruelty of individuals—with characters in works like Anna Karenina being depicted as having a "malignant face" that hints at inner malignancy [1][2][3]—but also the pervasive, almost cosmic presence of corruption, as when a mysterious fever or demonic influence is labeled malignant, suggesting an affliction that corrupts body and soul [4][5]. The word is equally at home in moral and metaphysical contexts, illustrating how seemingly benign environments or even celestial phenomena carry hidden, ruinous forces [6][7][8]. Whether characterizing the malicious humor of a wily figure or symbolizing a broader, destructive fate, malignant imbues its subjects with a sense of inevitability and dread that enriches the narrative’s darker undercurrents [9][10][11].