Oncoming Storm
Once per turn, any combat phasePick an Extremis Chamber unit that charged this turn and roll a dice. On a 3 or higher it gains Strike-first for the rest of the turn.
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This formation is printed in a paid battletome, so the effect here is summarised from a community rules mirror and is not confirmed against a free first-party download. Confirm the exact wording in your battletome.
Points, unit sizes and regiment options live in the free Battle Profiles download, last republished 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.
Pick an Extremis Chamber unit that charged this turn and roll a dice. On a 3 or higher it gains Strike-first for the rest of the turn.
The Extremis Chamber dragons the once-per-turn Strike-first roll is aimed at.
See the box: price and offersLong-range shooting to soften a target before the charge goes in.
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 Lightning Echelon β the Stormcast battle formation that turns Extremis Chamber dragons and dracoths into charge-and-strike-first alpha threats.
BySprue Sentry
ReviewedAug 28, 2026
SourceUsing the Scourge of Aqshy Rules (Games Workshop, free download)
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.
Lightning Echelon is the Extremis Chamber alpha-strike formation for Stormcast Eternals in Age of Sigmar 4th edition β built around big cavalry (Stormdrake Guard and other Extremis units) hitting first on the charge.
SprueSentry strategy commentary, not official rules. Confirm exact wording against your battletome and current General's Handbook.
The formation ability is Oncoming Storm. Once per turn in any combat phase, pick a friendly Extremis Chamber unit that charged this turn and roll a dice: on a 3 or higher it gains Strike-first for the rest of the turn. Striking before the enemy fights back is enormous on hard-hitting dragons, because you can delete a target and take fewer swings in return.
Note the roll. This is not guaranteed, and a 1 or 2 means your dragon eats the counter-punch first, so plan the charge as though the buff might not land.
Players who want a hammer-heavy, aggressive Stormcast list built on Stormdrake Guard and other Extremis cavalry. It's higher-risk, higher-reward than Thunderhead Host: fewer bodies, but devastating charges that can win the game in a couple of decisive turns.
Pick Lightning Echelon when you're committed to dragons and want to play a fast, decisive, alpha-strike game. Time the once-per-turn Strike-First for the charge that matters most. It's weaker on objective-heavy, swarm-out matchups where a low model count is punished, so pair the drakes with enough cheap battle-line to hold ground.
Once per turn, an Extremis Chamber unit that charged gains Strike-First on a 3+ β letting a hard-hitting dragon (Stormdrake Guard) or dracoth unit swing before the enemy fights back.
It's built around Extremis Chamber cavalry, of which Stormdrake Guard is the standout. If you're not running dragons/dracoths, Thunderhead Host or Vanguard Wing will suit your list better.
Written by Sprue Sentry, grounded in the cited sources. Original commentary, not Games Workshop rules text.