Do not open Empyrean here. Onyx Storm is 623 pages of 4/5 after Fourth Wing and Iron Flame — venin body-horror CW, a desperate-cure quest, an open-wound ending, books 4–5 still unpublished on this profile.
Iron Flame asked if you could still love him after the lie. Onyx Storm asks if you can still love him after the transformation.
4/5 after Iron Flame · 623 pages, open woundKindle before this tab coolsAudible trial often $0
Iron Flame asked if you could still love him after the lie. Onyx Storm asks if you can still love him after the transformation.
Feels like: Iron Flame asked if you could still love him after the lie. Onyx Storm asks if you can still love him after the transformation.
TL;DR: Spice 4/5 — fewer scenes than book 2, but each carries “this could be the last time” energy. Romance quieter because everything else is louder.
Mood
Desperate quest
Spice
🌶️ 4/5 Spicy
Pacing
Steady climb
Length
623 pages
Ending
Open wound
Lane
Romantasy
Series
Empyrean
Onyx Storm bibliographic record
Title
Onyx Storm
Series / position
Empyrean #3
Author
Rebecca Yarros
Publisher
Entangled: Red Tower Books
First published
2025-01-21
ISBN-13
9781649374189
ISBN-10 / ASIN
1649374186
Pages
623 (this edition)
Language
English
Genre
Romantasy
Spice (SBC)
4/5 Spicy · explicit on-page
How Onyx Storm actually reads
Crossing an ocean on a dying ship to find a cure before the person you love becomes the thing you have to kill.
623 pages. Steady climb. Reunion, then crisis. New continents, political courts, then war mode — no more spice after the last quarter tips into combat.
Spice 4/5: fewer scenes than Iron Flame. Shipboard privacy in the middle. Graphic battle violence and venin transformation are tagged.
Who should read Onyx Storm tonight
Swipe right if…
You survived Iron Flame’s cliffhanger and need this night next
Quest stakes tied to one person work on you
Body horror / transformation arcs are acceptable
You can live with another setup for unpublished later books
Graphic battle violence, body horror (venin transformation), death of significant characters, explicit sexual content, chronic illness and pain, grief and anticipatory loss, political manipulation, war and displacement.
Onyx Storm is 4/5 Spicy — Spice 4/5 — fewer scenes than book 2, but each carries “this could be the last time” energy. Romance quieter because everything else is louder..
4/5 Spicy. Fewer scenes than Iron Flame; each one is last-time energy, not a checklist. Full spice guide →
Where do I start Empyrean?
Fourth Wing, then Iron Flame. Onyx Storm is book 3 — you will be lost without the first two.
Does Onyx Storm close the series?
Open wound on this profile. Books 4 and 5 are still being written, per the live yes/no swipe.
Is there an audiobook?
Yes. Audible sample is usually one click. 623-page Empyrean #3, 4/5.
What CW is published?
Graphic battle violence, venin body horror, character death, explicit sex, chronic pain, grief, war. 623-page; Empyrean #3; Empyrean #3; 4/5 Spicy; Iron Flame asked if you could still love him after the lie. Onyx Storm asks if you can still love him after the transformation..
Last chance to stop scrolling
If you wanted the dragon-college door, that is Fourth Wing.
🌶️ 4/5 Spicy
Tap the cover. Start tonight. →