The Serpent and the Wings of Night

Why these tropes fit

Set in a vampire-ruled secondary world with dark magic and a death goddess, outcast human Oraya enters a brutal tournament to escape a life as prey. Forced to ally with her mysterious vampire rival Raihn—an enemy to her father’s crown and her top competitor—she faces a forbidden, high-stakes attraction that threatens her survival in a contest where love is a deadly liability.

Evidence from the source

• Enemies of the Crown: “He is a ruthless vampire, an efficient killer, an enemy to her father's crown...” source
• Forced Proximity: “To survive, Oraya is forced to make an alliance with a mysterious rival.” source
• Strong Heroine: “Oraya carved her place in a world designed to kill her. Her only chance to become something more than prey is entering the Kejari: a legendary tournament held by the goddess of death herself.” source
• Tournament: “Her only chance to become something more than prey is entering the Kejari: a legendary tournament held by the goddess of death herself.” source
• Vampire Romance: “He is a ruthless vampire, an efficient killer, an enemy to her father's crown... and her greatest competition. Yet, what terrifies Oraya most of all is that she finds herself oddly drawn to him.” source

Metadata source: Google Books. Quotes are used only to verify the tags.