Cinder Wyrm is a dragon boss. At the lowest Threat it has 900 health, hits for 21 and carries 2 armor; the uber version you meet in the Mortal Arena has ×3 the health and ×1.75 the damage. You need Cinderwyrm Scale to call it out.
It waits at the end of Cinder Forge, in place of Imp Overlord, and belongs to Demon Gate.
Every kill rolls its list twice. 8 Uniques sit on it: four ordinary ones splitting 90.0% of it between them, and four Exceptional ones splitting the last 10.0%, which puts any one of those at about 1 in 40 of what it gives up. The Exceptional ones are The Pyre King's Edge, Heart of the Furnace, The Ember Ledger and The Glassblower's Breath.
It fights with Furnace Sweep, Crucible Pounce and Furnace Unbound, and changes phase at 55% health.
It calls in Cinder Whelp.
Where you find it
What it calls in
Numbers
What it drops · the ordinary four
| Unique | Built on | Kind | Weight | Share of its drops | |
|---|---|---|---|---|---|
 | Emberscale Mantle | Exalted Wyrmscale Mail Armor | LESSER | 90 | |
 | Slagheart Signet | Immaculate Midnightsun Band Ring | LESSER | 90 | |
 | Bellows-Stride | Exalted Warpath Boots Boots | LESSER | 90 | |
 | The Furnace Psalter | Exalted Epitaph Tome Off Hand | LESSER | 90 |
What it drops · the Exceptional four
| Unique | Built on | Kind | Weight | Share of its drops | |
|---|---|---|---|---|---|
 | The Pyre King's Edge | Sovereign Pyreking Zweihander Main Hand | EXCEPTIONAL | 10 | |
 | Heart of the Furnace | Eternal Cinderwake Relic Relic | EXCEPTIONAL | 10 | |
 | The Ember Ledger | Immaculate Ransom Band Ring | EXCEPTIONAL | 10 | |
 | The Glassblower's Breath | Eternal Weepingglass Relic Relic | EXCEPTIONAL | 10 |