---
title: Onyx Dragon
description: A crystalline dragon that dwells deep underground and in the astral plane.
date_pub: 2024-04-21T12:07:39.000-04:00
section: bestiary
subsection: dragons-crystalline
content_type: feature
short_code: bdry0
---

A [crystalline dragon](./index.html) that dwells deep underground and in the astral plane.

<div class='headlessTableWrapper'>

|                   |                                                |
| ----------------- | ---------------------------------------------- |
| **Hit Dice**      | 6\*\* (27hp)                                   |
| **Armor Class**   | 16                                             |
| **Attacks**       | +5: 2 @ 1d4 (claw) & 1 @ 2d6 (bite), or breath |
| **Movement**      | 30' / 80' flying / 300' astral                 |
| **Saving Throws** | D10 W11 P12 B13 S14 (6)                        |
| **Morale**        | 8                                              |
| **Alignment**     | Chaotic                                        |
| **XP**            | 725                                            |

</div>

!!!include(bestiary/dragons/base.md)!!!

-   20% chance can speak and cast 1d3 1st level spells.
-   50% chance of sleeping (-2 AC while asleep).

### Breath Weapons

Spews multiple [breath weapons](../index.html#breath-weapon) from mouth.

-   Cloud of fear gas.
    -   50’ long, 40’ wide, 20’ high.
    -   All caught in area must **Save vs Blasts** or flee for 1d4 turns.
-   Cloud of chlorine gas.
    -   50’ long, 40’ wide, 20’ high.
    -   All caught in area take damage equal to dragon's current hit points, **Save vs Blasts** for half.
-   Can be used up to 3x per day total.
-   Immune to own breath weapons, automatically saves vs related attacks.

!!!include(bestiary/dragons/astral-gliding.md)!!!

!!!include(bestiary/dragons/planar-roar.md)!!!
