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Summarised from the free Games Workshop rules download named in the sources. Check the current Battle Profiles before a game.
Points, unit sizes and regiment options live in the free Battle Profiles download, last republished 29 July 2026. A newer Battle Profiles always replaces an older one, so check the current version before a game.
Unit picks are SprueSentry commentary, not part of the formation rule. The formation ability itself is summarised from the free Faction Pack: Fyreslayers.
Add 2 to the Health characteristic of friendly Magmadroth units. It is a flat increase on every Magmadroth in the army, with no trigger, range or once-per-turn limit.
The Magmadroth chassis the formation exists for, and the kit that builds the whole family of riders.
See the box: price and offersThe Priest that chants the Magmadroth prayer, which stacks with the extra Health rather than competing with it.
See the box: price and offersInfantry support for an army that has spent most of its points on beasts.
See the box: price and offersYou pick exactly one battle formation for your army, so choosing this one means you do not take these.
How to play Scales of Vulcatrix, the Fyreslayers battle formation that gives every Magmadroth in the army 2 extra Health.
Sprue Sentry strategy commentary for Age of Sigmar 4th edition, not official rules. Games Workshop updates points and rules regularly; always confirm against the current official rules and latest update before a game.
Scales of Vulcatrix is the monster battle formation for Fyreslayers in Age of Sigmar 4th edition, and the only one of the four that ignores your infantry entirely.
SprueSentry strategy commentary, not official rules. Summarised from the free Faction Pack: Fyreslayers, page-stamped August 2026.
The formation ability is Ancient Bloodlines, and it is passive. Add 2 to the Health characteristic of friendly Magmadroth units.
There is no trigger, no range, no once-per-turn limit and nothing to remember. Every Magmadroth in the list is simply bigger for the whole game.
Magmadroths carry a Battle Damaged ability that weakens them once they have taken a set number of damage points. Extra Health does not move that threshold, but it does buy you more turns at full strength relative to the total pool, and it moves the beast out of range of being finished off by a single big activation.
It also stacks cleanly with the things Fyreslayers already do for their monsters: the Droth-helm artefact buffs Companion weapons nearby, the Wrath of Vulcatrix prayer suppresses Battle Damaged for a turn, and the Scourge of Aqshy Marks of Vulcatrix table adds a defensive or offensive upgrade on top.
Players who bought Magmadroths and want to run two or three of them. With one Magmadroth this formation is a small bonus on a single model, and one of the other three will do more for the rest of the list.
Pick Scales of Vulcatrix when Magmadroths are a real share of your points. It is the lowest-maintenance formation in the faction, which makes it a good choice when you would rather spend your attention on the Ur-gold Runes than on remembering a conditional buff.
It is passive: friendly Magmadroth units add 2 to their Health characteristic. There is no trigger, range or usage limit.
Rarely. It is a flat bonus on Magmadroths only, so with a single beast you are spending your one formation slot on one model while your infantry get nothing.
No. Battle Damaged triggers on damage points taken, so the threshold does not move. The extra Health buys survivability, not immunity. The Wrath of Vulcatrix prayer is the ability that suppresses Battle Damaged for a turn.
Written by Sprue Sentry, grounded in the cited sources. Original commentary, not Games Workshop rules text.