Onyx Storm cover
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The Empyrean Series 3 Books Collection Set (Fourth Wing, Iron Flame & Onyx Storm) (3 books) ↗

Onyx Storm

Rebecca Yarros · 2025

The Empyrean · Book 3

FaeIndex Verdict

Readers drawn to mortal leads navigating dragon bonds and dark academia with heavy political stakes will match this entry's blend of high steam and forced proximity. Its distinction lies in fusing dual POV with betrayal and hidden power revelations that sharpen the tension between fated mates and moral ambiguity.

Spice Level

🔥🔥🔥🔥🔥 explicit, moderately frequent

Tropes

Dragons Dark Academia High Steam Political Intrigue Betrayal Found Family Chosen One Cliffhanger Ending Morally Grey Love Interest Secret Identity / Hidden Power Enemies to Lovers Forced Proximity Dual POV Slow Burn Fated Mates Forbidden Romance Power Imbalance

Content Warnings

Graphic Violence War and Atrocities Death of Major Character

Series Status

ongoing

Protagonist

mortal

Last reviewed: 2026-06-20

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